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'61HN252' by American Honda Motor Co. - Page 1 of 540
[2005-2008] [TRX500 FA/FGA]
A Few Words About Safety
Service Information
The service and repair information contained in this manual is intended for use by qualified, professional technicians.
Attempting service or repairs without the proper training, tools, and equipment could cause injury to you or others. It could also
damage the vehicle or create an unsafe condition.
This manual describes the proper methods and procedures for performing service, maintenance, and repairs. Some procedures
require the use of specially designed tools and dedicated equipment. Any person who intends to use a replacement part, service
procedure or a tool that is not recommended by Honda, must determine the risks to their personal safety and the safe operation of
the vehicle.
If you need to replace a part, use genuine Honda parts with the correct part number or an equivalent part. We strongly recommend
that you do not use replacement parts of inferior quality.
For Your Customer's Safety
Proper service and maintenance are essential to the customer's safety and
the reliability of the vehicle. Any error or oversight while servicing a vehicle
can result in faulty operation, damage to the vehicle, or injury to others.
For Your Safety
Because this manual is intended for the professional service technician, we
do not provide warnings about many basic shop safety practices (e.g., Hot
partswear gloves). If you have not received shop safety training or do not
feel confident about your knowledge of safe servicing practice, we
recommended that you do not attempt to perform the procedures described
in this manual.
Some of the most important general service safety precautions are given
below. However, we cannot warn you of every conceivable hazard that can
arise in performing service and repair procedures. Only you can decide
whether or not you should perform a given task.
Important Safety Precautions
Make sure you have a clear understanding of all basic shop safety practices and that you are wearing appropriate clothing and
using safety equipment. When performing any service task, be especially careful of the following:
· Read all of the instructions before you begin, and make sure you have the tools, the replacement or repair parts, and the skills
required to perform the tasks safely and completely.
· Protect your eyes by using proper safety glasses, goggles or face shields any time you hammer, drill, grind, pry or work around
pressurized air or liquids, and springs or other stored-energy components. If there is any doubt, put on eye protection.
· Use other protective wear when necessary, for example gloves or safety shoes. Handling hot or sharp parts can cause severe
burns or cuts. Before you grab something that looks like it can hurt you, stop and put on gloves.
· Protect yourself and others whenever you have the vehicle up in the air. Any time you lift the vehicle, either with a hoist or a jack,
make sure that it is always securely supported. Use jack stands.
Make sure the engine is off before you begin any servicing procedures, unless the instruction tells you to do otherwise.
This will help eliminate several potential hazards:
· Carbon monoxide poisoning from engine exhaust. Be sure there is adequate ventilation whenever you run the engine.
· Burns from hot parts or coolant. Let the engine and exhaust system cool before working in those areas.
· Injury from moving parts. If the instruction tells you to run the engine, be sure your hands, fingers and clothing are out of the way.
Gasoline vapors and hydrogen gases from batteries are explosive. To reduce the possibility of a fire or explosion, be careful when
working around gasoline or batteries.
· Use only a nonflammable solvent, not gasoline, to clean parts.
· Never drain or store gasoline in an open container.
· Keep all cigarettes, sparks and flames away from the battery and all fuel-related parts.
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http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
Improper service or repairs can create an
unsafe condition that can cause your customer
or others to be seriously hurt or killed.
Follow the procedures and precautions in this
manual and other service materials carefully.
Failure to properly follow instructions and
precautions can cause you to be seriously hurt
or killed.
Follow the procedures and precautions in this
manual carefully.
3/9/2008 10:22 PM

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Summary of Contents for Honda 2005-2008 RX500 FA

  • Page 1 Any person who intends to use a replacement part, service procedure or a tool that is not recommended by Honda, must determine the risks to their personal safety and the safe operation of the vehicle.
  • Page 2: Table Of Contents

    '61HN252' by American Honda Motor Co. - Page 2 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HOW TO USE THIS MANUAL CONTENTS This service manual describes the service procedures for the GENERAL INFORMATION TRX500FA/FGA. Follow the Maintenance Schedule (Section 3) recommendations to...
  • Page 3 '61HN252' by American Honda Motor Co. - Page 3 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SYMBOLS The symbols used throughout this manual show specific service procedures. If supplementary information is required pertaining to these symbols, it would be explained specifically in the text without the use of the symbols.
  • Page 4: Trx500Fa/Fga

    '61HN252' by American Honda Motor Co. - Page 4 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] 1 of 1 3/9/2008 10:23 PM...
  • Page 5 '61HN252' by American Honda Motor Co. - Page 5 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] 1 of 1 3/9/2008 10:23 PM...
  • Page 6 '61HN252' by American Honda Motor Co. - Page 6 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] 1 of 1 3/9/2008 10:23 PM...
  • Page 7: General Information

    '61HN252' by American Honda Motor Co. - Page 7 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION SERVICE RULES ········································· 1-2 REAR WHEEL/SUSPENSION SPECIFICATIONS ····································· 1-10 MODEL IDENTIFICATION··························· 1-2 BRAKE SYSTEM SPECIFICATIONS ········ 1-10 GENERAL SPECIFICATIONS ······················ 1-5 FRONT DRIVING MECHANISM SPECIFICATIONS ·····································...
  • Page 8: Service Rules

    GENERALINFORMATION SERVICE RULES 1. Use genuine Honda or Honda-recommended parts and lubricants or their equivalents. Parts that don't meet Honda's design specifications may cause damage to the vehicle. 2. Use the special tools designed for this product to avoid damage and incorrect assembly.
  • Page 9 '61HN252' by American Honda Motor Co. - Page 9 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION The Vehicle Identification Number (VIN) is stamped on the front side of VEHICLE IDENTIFICATION NUMBER the frame. The engine serial number is stamped on the right side of the crank- case.
  • Page 10 '61HN252' by American Honda Motor Co. - Page 10 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION The carburetor identification number is stamped on the left side of the carburetor body. CARBURETOR IDENTIFICATION NUMBER The vehicle emission control information label is attached on the right U.S.A.
  • Page 11: General Specifications

    '61HN252' by American Honda Motor Co. - Page 11 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION GENERAL SPECIFICATIONS ITEM SPECIFICATIONS DIMENSIONS Overall length 2,108 mm (83.0 in) Overall width 1,188 mm (46.8 in) Overall height 1,179 mm (46.4 in) Wheelbase 1,286 mm (50.6 in)
  • Page 12 '61HN252' by American Honda Motor Co. - Page 12 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION ITEM SPECIFICATIONS CARBURETOR Carburetor type Constant Velocity (VE type) Throttle bore 36 mm (1.4 in) DRIVE TRAIN Clutch system Centrifugal, wet Transmission HONDAMATIC (automatic; non-stage speed)
  • Page 13: Lubrication System Specifications

    '61HN252' by American Honda Motor Co. - Page 13 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION LUBRICATION SYSTEM SPECIFICATIONS Unit: mm (in) ITEM STANDARD SERVICE LIMIT Engine oil capacity After draining 4.4 liters (4.7 US qt, 3.9 lmp qt) After draining/filter 4.6 liters (4.9 US qt, 4.0 lmp qt)
  • Page 14: Cylinder Head/Valve/Camshaft Specifications

    '61HN252' by American Honda Motor Co. - Page 14 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION CYLINDER HEAD/VALVE/CAMSHAFT SPECIFICATIONS Unit: mm (in) ITEM STANDARD SERVICE LIMIT Cylinder compression at 450 rpm (min 608 902 kPa (6.2 9.2 kgf/cm , 88 131...
  • Page 15: Alternator/Starter Clutch Specifications

    '61HN252' by American Honda Motor Co. - Page 15 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION ALTERNATOR/STARTER CLUTCH SPECIFICATIONS Unit: mm (in) ITEM STANDARD SERVICE LIMIT Starter driven gear boss O.D. 51.705 51.718 (2.0356 2.0361) 51.705 (2.0356) SUB-TRANSMISSION SPECIFICATIONS...
  • Page 16: Front Wheel/Suspension/Steering Specifications

    '61HN252' by American Honda Motor Co. - Page 16 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION FRONT WHEEL/SUSPENSION/STEERING SPECIFICATIONS ITEM STANDARD SERVICE LIMIT Minimum tire tread depth 4.0 mm (0.16 25 kPa (0.25 kgf/cm , 3.6 psi) Cold tire pressure Standard 22 kPa (0.22 kgf/cm...
  • Page 17: Front Driving Mechanism Specifications

    '61HN252' by American Honda Motor Co. - Page 17 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION FRONT DRIVING MECHANISM SPECIFICATIONS Unit: mm (in) ITEM STANDARD SERVICE LIMIT Front differ- Oil capacity After draining 185 cm (6.3 US oz, 6.5 Imp oz)
  • Page 18: Lights/Meters/Switches Specifications

    '61HN252' by American Honda Motor Co. - Page 18 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION LIGHTS/METERS/SWITCHES SPECIFICATIONS ITEM SPECIFICATIONS Bulb Headlight (high/low beam) 12V - 30/30 W x 2 Assist headlight 12V - 45 W Brake/taillight `05, `06...
  • Page 19: Standard Torque Values

    '61HN252' by American Honda Motor Co. - Page 19 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION STANDARD TORQUE VALUES TORQUE TORQUE FASTENER TYPE N·m (kgf·m, lbf·ft) FASTENER TYPE N·m (kgf·m, lbf·ft) 5 mm bolt and nut 5 (0.5, 3.6) 5 mm screw 4 (0.4, 2.9)
  • Page 20 '61HN252' by American Honda Motor Co. - Page 20 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION CENTRIFUGAL CLUTCH THREAD TORQUE ITEM Q'TY DIA. (mm) N·m (kgf·m, lbf·ft) REMARKS Centrifugal clutch lock nut 118 (12.0, 87) NOTE 2, 8 Oil feed pipe setting cap 18 (1.8, 13)
  • Page 21 '61HN252' by American Honda Motor Co. - Page 21 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION Cylinder stud bolt 236 ± 0.8 mm (9.29 0.03 in) Exhaust pipe stud bolt 23 ± 0.5 mm (0.9 ± 0.02 in) 50 mm (2.0 in) Insulator band 1.5 - 3.0 mm...
  • Page 22 '61HN252' by American Honda Motor Co. - Page 22 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION FRAME FRAME/BODY PANELS/EXHAUST SYSTEM THREAD TORQUE ITEM Q'TY DIA. (mm) N·m (kgf·m, lbf·ft) REMARKS Front carrier/carry pipe bolt 37 (3.8, 27) Gearshift lever knob screw 2 (0.2, 1.4)
  • Page 23 '61HN252' by American Honda Motor Co. - Page 23 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION FRONT WHEEL/SUSPENSION/STEERING THREAD TORQUE ITEM Q'TY DIA. (mm) N·m (kgf·m, lbf·ft) REMARKS Handlebar lower holder nut 39 (4.0, 29) NOTE 5 Front wheel nut 64 (6.5, 47)
  • Page 24 '61HN252' by American Honda Motor Co. - Page 24 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION REAR DRIVING MECHANISM THREAD TORQUE ITEM Q'TY DIA. (mm) N·m (kgf·m, lbf·ft) REMARKS Final gear case pinion bearing lock nut 98 (10.0, 72)
  • Page 25: Lubrication & Seal Points

    '61HN252' by American Honda Motor Co. - Page 25 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION LUBRICATION & SEAL POINTS ENGINE LOCATION MATERIAL REMARKS Camshaft cam lobes Molybdenum disul- fide solution (a mix- Rocker arm shaft sliding surface ture of 1/2 engine oil...
  • Page 26 '61HN252' by American Honda Motor Co. - Page 26 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION FRAME LOCATION MATERIAL REMARKS Steering shaft bushing inner surface Urea based multi- Apply 2 3 g purpose grease Gearshift box pivot and sliding area...
  • Page 27 '61HN252' by American Honda Motor Co. - Page 27 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION LOCATION MATERIAL REMARKS Front brake lever-to-master piston contacting area Silicone grease Front brake lever pivot and sub-arm pivot collar Front brake caliper pin bolt...
  • Page 28: Cable & Harness Routing

    '61HN252' by American Honda Motor Co. - Page 28 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION CABLE & HARNESS ROUTING `05, `06: THROTTLE CABLE GPS CONNECTOR (GPS model only) ASSIST HEADLIGHT CONNECTOR HAND BRAKE CABLE FRONT BRAKE HOSE STARTING ENRICHMENT...
  • Page 29 '61HN252' by American Honda Motor Co. - Page 29 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: HAND BRAKE CABLE THROTTLE CABLE REAR FINAL GEAR CASE BREATHER HOSE FRONT FINAL GEAR CASE BREATHER HOSE FRONT BRAKE HOSE REAR BRAKE...
  • Page 30 '61HN252' by American Honda Motor Co. - Page 30 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: THROTTLE CABLE FRONT BRAKE HOSE 2WD/4WD SELECT SWITCH WIRE RIGHT HANDLEBAR SWITCH WIRE STARTING ENRICHMENT (SE) VALVE CABLE After `06: THROTTLE CABLE...
  • Page 31 '61HN252' by American Honda Motor Co. - Page 31 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: HAND BRAKE CABLE HORN SWITCH (U type only) MODE SELECT SWITCH LEFT HANDLEBAR SWITCH WIRE MODE SELECT SWITCH WIRE After `06:...
  • Page 32 '61HN252' by American Honda Motor Co. - Page 32 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: ECM 5P (BLACK) CONNECTOR ECM 21P (BLACK) CONNECTOR ASSIST HEADLIGHT 2P ECM 21P (GRAY) MAIN WIRE HARNESS (BLACK) HANDLE SWITCH 10P...
  • Page 33 '61HN252' by American Honda Motor Co. - Page 33 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION After `06: ECM 5P (BLACK) CONNECTOR ECM 21P (BLACK) CONNECTOR ECM 21P (GRAY) MAIN WIRE HARNESS HANDLE SWITCH 14P CONNECTOR (GREEN) CONNECTOR COMBINATION METER 14P...
  • Page 34 '61HN252' by American Honda Motor Co. - Page 34 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: HORN SWITCH WIRE (U type only) MAIN WIRE HARNESS REAR FINAL GEAR CASE BREATHER HOSE FAN MOTOR WIRE BAND: - Accessory socket wire...
  • Page 35 '61HN252' by American Honda Motor Co. - Page 35 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION FRONT BRAKE HOSE STARTING ENRICHMENT (SE) VALVE CABLE REAR FINAL GEAR HAND BRAKE CABLE CASE BREATHER HOSE REAR BRAKE BREATHER HOSE FAN MOTOR...
  • Page 36 '61HN252' by American Honda Motor Co. - Page 36 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: REVERSE SWITCH WIRE SPARK PLUG WIRE IGNITION COIL IGNITION SWITCH WIRE CONTROL MOTOR 2P CARBURETOR HEATER (NATURAL) CONNECTOR SWITCH WIRE BAND:...
  • Page 37 '61HN252' by American Honda Motor Co. - Page 37 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION After `06: CARBURETOR HEATER SWITCH WIRE REVERSE SWITCH WIRE IGNITION COIL CONTROL MOTOR 2P (NATURAL) CONNECTOR BAND: - Front speed sensor wire - Front final clutch wire...
  • Page 38 '61HN252' by American Honda Motor Co. - Page 38 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION CLIP: - Rear final gear case breather hose MAIN WIRE HARNESS - Rear brake breather hose - Radiator breather hose - Hand brake cable...
  • Page 39 '61HN252' by American Honda Motor Co. - Page 39 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION `05, `06: SPARK PLUG WIRE THROTTLE CRANKCASE BREATHER PIPE POSITION SENSOR IGNITION COIL CARBURETOR HEATER WIRE ANGLE SENSOR CONTROL MOTOR WIRE CONTROL MOTOR 2P...
  • Page 40 '61HN252' by American Honda Motor Co. - Page 40 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION After `06: SPARK PLUG WIRE THROTTLE CRANKCASE BREATHER PIPE POSITION SENSOR IGNITION COIL CARBURETOR HEATER WIRE ANGLE SENSOR CONTROL MOTOR WIRE CONTROL MOTOR 2P...
  • Page 41 '61HN252' by American Honda Motor Co. - Page 41 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION STARTING ENRICHMENT THROTTLE CABLE (SE) VALVE CABLE AIR VENT HOSES FUEL HOSE THROTTLE POSITION SENSOR CRANKCASE BREATHER PIPE SPARK PLUG WIRE CARBURETOR HEATER WIRE...
  • Page 42 '61HN252' by American Honda Motor Co. - Page 42 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION STARTING ENRICHMENT (SE) VALVE CABLE CLIP: - Main wire harness THROTTLE CABLE FUEL HOSE - Hand brake cable - Rear brake breather hose...
  • Page 43 '61HN252' by American Honda Motor Co. - Page 43 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION REAR BRAKE BREATHER HOSE ALTERNATOR 5P HAND BRAKE CABLE (NATURAL) CONNECTOR REAR FINAL GEAR CASE BREATHER HOSE MAIN WIRE HARNESS GEAR POSITION SWITCH 4P...
  • Page 44 '61HN252' by American Honda Motor Co. - Page 44 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION GROUND CABLE GEAR POSITION SWITCH WIRE (Engine-to-frame) CARBURETOR DRAIN HOSE ALTERNATOR WIRE CLIP: - Alternator wire SIPHON HOSE - Gear position switch wire...
  • Page 45 '61HN252' by American Honda Motor Co. - Page 45 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION Except U type : CLIPS: - Front speed sensor wire BRAKE HOSE - Front final clutch wire - Rear speed sensor wire - Front final gear case breather hose...
  • Page 46 '61HN252' by American Honda Motor Co. - Page 46 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION Reverse side of the front fender: HEAD LIGHT WIRE ACCESSORY SOCKET ACCESSORY SOCKET WIRE `05, `06: Reverse side of the rear fender: TAIL/BRAKE LIGHT WIRE...
  • Page 47 '61HN252' by American Honda Motor Co. - Page 47 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION After `06: TAIL/BRAKE LIGHT TAIL/BRAKE LIGHT WIRE FUSE BOX BATTERY 2P (NATURAL) STARTER RELAY SWITCH 2P CONNECTOR (NATURAL) CONNECTOR BATTERY STARTER MOTOR CABLE...
  • Page 48: Instructions

    Carbon monoxide does not react in the same way, but it is toxic. Honda Motor Co., Ltd. utilizes lean carburetor settings as well as other systems to reduce oxides of nitrogen, carbon mon- oxide and hydrocarbons.
  • Page 49 '61HN252' by American Honda Motor Co. - Page 49 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] GENERAL INFORMATION SERVICING THE HONDA U.S.A. Only Maintenance, replacement or repair of the emission control devices and systems may be performed by any ATV repair establishment or individual using parts that are "certified"...
  • Page 50 '61HN252' by American Honda Motor Co. - Page 50 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:29 PM...
  • Page 51: Frame/Body Panels/Exhaust System

    '61HN252' by American Honda Motor Co. - Page 51 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM SERVICE INFORMATION ··························· 2-2 INNER COVER ············································ 2-7 TROUBLESHOOTING ································· 2-2 FRONT MUD GUARD································· 2-8 BODY PANEL LOCATIONS ························ 2-3 INNER FENDER ·········································· 2-9 TRIM CLIP····················································...
  • Page 52: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 52 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM FRAME/BODYPANELS/EXHAUSTSYSTEM SERVICE INFORMATION GENERAL · This section covers removal and installation of the body panels and exhaust system. · Serious burns may result if the exhaust system is not allowed to cool before components are removed or serviced.
  • Page 53: Body Panel Locations

    '61HN252' by American Honda Motor Co. - Page 53 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM BODY PANEL LOCATIONS '05, '06 shown: (22) (19) (25) (24) (18) (17) (11) (23) (24) (13) (20) (15) (21) (16) (10) (14)
  • Page 54: Trim Clip

    '61HN252' by American Honda Motor Co. - Page 54 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM TRIM CLIP Release by pulling the center pin up using a snap ring pliers or flat blade screwdriver and remove the Remove and install trim clip.
  • Page 55: Engine Guard

    '61HN252' by American Honda Motor Co. - Page 55 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM ENGINE GUARD Remove the four bolts and engine guard. ENGINE GUARD Installation is in the reverse order of removal. BOLTS GEARSHIFT LEVER KNOB Remove the two screws and gearshift lever knob.
  • Page 56: Fuel Tank Cover

    '61HN252' by American Honda Motor Co. - Page 56 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM LEFT SIDE COVER Remove the left side cover by releasing the three LEFT SIDE COVER GROMMETS bosses from the grommets. Installation is in the reverse order of removal.
  • Page 57: Center Mud Guard

    '61HN252' by American Honda Motor Co. - Page 57 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM CENTER MUD GUARD RIGHT CENTER MUD GUARD Remove the following: BOLTS SOCKET BOLT FOOTPEG recoil starter cover (page 2-4) right side cover...
  • Page 58: Front Mud Guard

    '61HN252' by American Honda Motor Co. - Page 58 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM LEFT INNER COVER Remove the left center mud guard (page 2-7). LEFT INNER HOOKS Remove the left inner cover by releasing the hooks.
  • Page 59: Front Carrier

    '61HN252' by American Honda Motor Co. - Page 59 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM INNER FENDER RIGHT INNER FENDER Remove the following: TAPPING RIGHT INNER two stay bolts BOLTS FENDER four trim clips two tapping bolts right inner fender Installation is in the reverse order of removal.
  • Page 60: Front Carry Pipe

    '61HN252' by American Honda Motor Co. - Page 60 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM FRONT CARRY PIPE CARRY PIPE GUARD Remove the following: CARRY PIPE GUARD two bolts four trim clip carry pipe guard Installation is in the reverse order of removal.
  • Page 61: Front Fender

    '61HN252' by American Honda Motor Co. - Page 61 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM FRONT FENDER Remove the following: TAPPING CONNECTORS fuel tank cover (page 2-6) SCREWS carry pipe (page 2-10) eight trim clips four tapping bolts...
  • Page 62: Rear Fender

    '61HN252' by American Honda Motor Co. - Page 62 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM REAR FENDER Remove the battery (page 19-5) FUSE BOX CONNECTORS STARTER Disconnect the starter motor cable from the starter RELAY relay by removing the terminal nut and washer.
  • Page 63: Outer Fender

    '61HN252' by American Honda Motor Co. - Page 63 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM OUTER FENDER HEADLIGHT GRILLE Remove the following: SCREWS two screws four trim clips headlight grille Installation is in the reverse order of removal.
  • Page 64: Exhaust System

    '61HN252' by American Honda Motor Co. - Page 64 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM REAR CORNER OUTER FENDER (After '06) Remove the following: six trim clips rear corner outer fender Install the rear corner outer fender in the reverse order of removal.
  • Page 65 '61HN252' by American Honda Motor Co. - Page 65 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM Release the crankcase breather pipe clips from the stay on the muffler. Remove the mounting bolt, washers, seat rubbers and collar then remove the muffler from the frame.
  • Page 66 '61HN252' by American Honda Motor Co. - Page 66 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM DISASSEMBLY/ASSEMBLY 3.2 N·m (0.3 kgf·m, 2.4 lbf·ft) 3.2 N·m (0.3 kgf·m, 2.4 lbf·ft) 45° BAND BAND FRONT EXHAUST PIPE COVER 5.4 N·m (0.6 kgf·m, 4.0 lbf·ft)
  • Page 67 '61HN252' by American Honda Motor Co. - Page 67 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRAME/BODY PANELS/EXHAUST SYSTEM INSTALLATION BREATHER PIPE CLIP STAY JOINT GASKET COLLAR SEAT RUBBERS MUFFLER JOINT NUTS MUFFLER EXHAUST PIPE GASKET BAND BOLTS MOUNTING BOLT WASHERS Install the new joint gasket and muffler gasket.
  • Page 68 '61HN252' by American Honda Motor Co. - Page 68 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:37 PM...
  • Page 69: Maintenance

    '61HN252' by American Honda Motor Co. - Page 69 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE SERVICE INFORMATION ··························· 3-2 DRIVE SHAFT BOOTS······························ 3-17 MAINTENANCE SCHEDULE ······················ 3-4 REAR FINAL GEAR CASE OIL AND DIFFERENTIAL OIL ··································· 3-18 FUEL LINE ··················································· 3-5 BRAKE FLUID ···········································...
  • Page 70: Service Information

    '61HN252' by American Honda Motor Co. - Page 70 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE MAINTENANCE SERVICE INFORMATION GENERAL · Place the vehicle on a level ground before starting any work. · The exhaust contains poisonous carbon monoxide gas that may cause loss of consciousness and may lead to death.
  • Page 71 '61HN252' by American Honda Motor Co. - Page 71 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE TORQUE VALUES Spark plug 22 N·m (2.2 kgf·m, 16 lbf·ft) Valve adjusting screw lock-nut 17 N·m (1.7 kgf·m, 13 lbf·ft) Timing hole cap 10 N·m (1.0 kgf·m, 7 lbf·ft) Engine oil drain bolt 25 N·m (2.5 kgf·m, 18 lbf·ft)
  • Page 72: Maintenance Schedule

    ** STEERING SYSTEM 3-26 Should be serviced by an authorized Honda dealer, unless the owner has proper tools and service data and is mechanically qualified. ** In the interest of safety, we recommend these items be serviced only by an authorized Honda dealer.
  • Page 73: Fuel Line

    '61HN252' by American Honda Motor Co. - Page 73 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE FUEL LINE Remove the seat (page 2-4). RUBBER SEAT Remove the fuel tank cover (page 2-6). Turn over the rubber seat. Check the fuel line for deterioration, damage or leakage.
  • Page 74: Air Cleaner

    '61HN252' by American Honda Motor Co. - Page 74 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE CARBURETOR CHOKE This model's choke system uses a fuel enriching cir- CHOKE KNOB cuit controlled by a starting enrichment (SE) valve. The SE valve opens the enriching circuit via a cable when the choke knob is pulled up.
  • Page 75 '61HN252' by American Honda Motor Co. - Page 75 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE Remove the dust cover and clean it with com- pressed air if it is dirty. Install the dust cover in position. DUST COVER Wash the element and filter in non-flammable or high flash point solvent.
  • Page 76: Air Cleaner Housing Drain Hose

    '61HN252' by American Honda Motor Co. - Page 76 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE Tighten the air cleaner element band screw. BAND Install the air cleaner element retainer. RETAINER SCREW Install the air cleaner housing cover while aligning The "FRONT"...
  • Page 77: Spark Plug

    '61HN252' by American Honda Motor Co. - Page 77 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE SPARK PLUG REMOVAL Remove the seat (page 2-4). TRIM CLIP RUBBER SEAT Loosen the band screw and remove the trim clip and resonance chamber.
  • Page 78: Valve Clearance

    '61HN252' by American Honda Motor Co. - Page 78 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE Check the gap between the center and side elec- To prevent WIRE TYPE FEELER GAUGE trodes with a wire type feeler gauge. damaging the iridium center Make sure that the φ...
  • Page 79 '61HN252' by American Honda Motor Co. - Page 79 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE Rotate the crankshaft using the recoil starter knob "T" MARK and align the "T" mark on the flywheel with the index mark on the alternator cover.
  • Page 80: Engine Oil

    '61HN252' by American Honda Motor Co. - Page 80 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE Install and tighten the bolts to the specified torque. BOLTS Coat a new O-ring with engine oil and install it onto the timing hole cap.
  • Page 81 '61HN252' by American Honda Motor Co. - Page 81 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE The oil tank contains a sufficient amount of oil if the UPPER LEVEL DIPSTICK oil level is between the upper and lower level marks on the dipstick.
  • Page 82 '61HN252' by American Honda Motor Co. - Page 82 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE OIL CHANGE · Pour the engine oil after replacing the oil filter (page 3-15). · Change the oil with the engine warm to assure complete and rapid draining.
  • Page 83: Engine Oil Filter

    '61HN252' by American Honda Motor Co. - Page 83 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE ENGINE OIL FILTER Drain the engine oil (page 3-14). OIL FILTER Remove the engine guard (page 2-5). Remove the oil filter center bolt, cover, spring, washer and oil filter.
  • Page 84: Radiator Coolant

    '61HN252' by American Honda Motor Co. - Page 84 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE RADIATOR COOLANT Check the coolant level of the reserve tank with the UPPER LEVEL LINE engine running at normal operating temperature. The level should be between the "UPPER" and "LOWER"...
  • Page 85: Drive Shaft Boots

    '61HN252' by American Honda Motor Co. - Page 85 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE Remove the trim clips, radiator side plates and radi- GRILLE PLATE TRIM CLIPS ator grille plate. SIDE PLATE TRIM CLIPS Check the radiator air passage for clogging or dam- age.
  • Page 86 '61HN252' by American Honda Motor Co. - Page 86 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE REAR FINAL GEAR CASE OIL AND DIFFERENTIAL OIL FINAL GEAR CASE OIL LEVEL CHECK Place the vehicle on a level surface. SEALING WASHER Remove the oil check bolt and sealing washer, check that the oil flows out of the check bolt hole.
  • Page 87 '61HN252' by American Honda Motor Co. - Page 87 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE OIL CHANGE Place the vehicle on a level surface. SEALING WASHER Remove the oil filler cap and drain bolt to drain the oil. When the oil is completely drained, install the drain bolt with a new sealing washer.
  • Page 88: Brake Fluid

    '61HN252' by American Honda Motor Co. - Page 88 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE OIL CHANGE Place the vehicle on a level surface. SEALING WASHER Remove the oil filler cap and drain bolt to drain the oil. When the oil is completely drained, install the drain bolt with a new sealing washer.
  • Page 89: Brake Shoes Wear

    '61HN252' by American Honda Motor Co. - Page 89 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE BRAKE SHOES WEAR INSPECTION Replace the brake shoes if the indicator plate aligns REFERENCE MARK with the brake panel reference mark when the rear brake lever or pedal is applied.
  • Page 90: Brake System

    '61HN252' by American Honda Motor Co. - Page 90 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE BRAKE SYSTEM FRONT BRAKE Inspect the brake hoses, pipes and fittings for deteri- oration, cracks and signs of leakage. Tighten any loose fittings. BRAKE HOSE Replace hoses and fittings as required.
  • Page 91: Skid Plate, Engine Guard

    '61HN252' by American Honda Motor Co. - Page 91 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE BRAKE PEDAL Measure the brake pedal free play at the end of the brake pedal and adjust as required. BRAKEPEDAL FREE PLAY: 15 20 mm...
  • Page 92: Spark Arrester

    '61HN252' by American Honda Motor Co. - Page 92 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE REAR SUSPENSION INSPECTION Replace damaged components which cannot be REAR: repaired. Tighten all nuts and bolts. SWINGARM BEARINGS INSPECTION Raise the rear wheels off the ground by placing a jack or block under the engine.
  • Page 93: Nuts, Bolts, Fasteners

    '61HN252' by American Honda Motor Co. - Page 93 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE NUTS, BOLTS, FASTENERS Check that all chassis nuts and bolts are tightened to their correct torque values (page 1-13). Check that all cotter pins, safety clips, hose clamps and cable stays are in place and properly secured.
  • Page 94: Steering System

    '61HN252' by American Honda Motor Co. - Page 94 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MAINTENANCE STEERING SYSTEM Place the vehicle on a level ground with the front wheels facing straight ahead. Mark the centers of the tires with chalk to indicate the axle center height.
  • Page 95: Lubrication System

    '61HN252' by American Honda Motor Co. - Page 95 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM LUBRICATION SYSTEM DIAGRAM ·········· 4-2 OIL COOLER ··············································· 4-7 SERVICE INFORMATION ··························· 4-3 OIL STRAINER ············································ 4-8 TROUBLESHOOTING ································· 4-5 OIL PUMP ················································· 4-12 OIL PRESSURE CHECK ······························...
  • Page 96: Lubrication System Diagram

    '61HN252' by American Honda Motor Co. - Page 96 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM LUBRICATIONSYSTEM LUBRICATION SYSTEM DIAGRAM ROCKER ARMS CAMSHAFT CENTRIFUGAL OIL PRESSURE CLUTCH CHECK VALVE FLYWHEEL/ STARTER CLUTCH OIL COOLER COUNTERSHAFT OIL PRESSURE RELIEF VALVE...
  • Page 97 '61HN252' by American Honda Motor Co. - Page 97 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM SERVICE INFORMATION GENERAL Used engine oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods. Although this is unlikely unless you handle used oil on a daily basis, it is still advisable to thoroughly wash your hands with soap and water as soon as possible after handling used oil.
  • Page 98 '61HN252' by American Honda Motor Co. - Page 98 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM TOOLS Oil pressure gauge Oil pressure gauge Pressure gauge hose 07YAJ-0010100 07YAJ-0010300 07FPJ-7520100 Not available in U.S.A. Not available in U.S.A. Not available in U.S.A.
  • Page 99: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 99 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM TROUBLESHOOTING Oil level too low high oil consumption · Oil consumption · External oil leak · Worn piston rings or incorrect piston ring installation ·...
  • Page 100: Oil Pressure Check

    '61HN252' by American Honda Motor Co. - Page 100 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM OIL PRESSURE CHECK PRESSURE INSPECTION Check the oil level and add the recommended oil if SEALING BOLT AND WASHER necessary (page 3-12). Also, check the engine and oil line for external oil leak before checking the oil pressure.
  • Page 101: Oil Cooler

    '61HN252' by American Honda Motor Co. - Page 101 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM CHECK VALVE INSPECTION Remove the oil gallery sealing bolt and washer on SPRING the right side of the front crankcase cover. Remove the valve spring and check valve.
  • Page 102: Oil Strainer

    '61HN252' by American Honda Motor Co. - Page 102 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Remove the four bolts and the oil cooler from the BOLTS radiator. OIL COOLER INSTALLATION Install the oil cooler onto the radiator and tighten BOLTS the four bolts securely.
  • Page 103 '61HN252' by American Honda Motor Co. - Page 103 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Remove the five bolts and oil tank. BOLTS Remove the O-rings and collar. OIL TANK Remove the five bolts from the front oil tank.
  • Page 104 '61HN252' by American Honda Motor Co. - Page 104 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Apply sealant to the mating surface of the front oil tank. Coat a new O-ring with engine oil and install it onto the plate on the rear oil tank.
  • Page 105 '61HN252' by American Honda Motor Co. - Page 105 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Install the oil tank onto the front crankcase cover BOLTS and tighten the five bolts securely. OIL TANK Coat new O-rings with oil and install them onto the...
  • Page 106: Oil Pump

    '61HN252' by American Honda Motor Co. - Page 106 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Remove the bolt and oil strainer screen for the main BOLT scavenge pump. OIL STRAINER SCREEN (MAIN SCAVENGE) Clean the oil strainer and screen thoroughly.
  • Page 107 '61HN252' by American Honda Motor Co. - Page 107 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Remove the O-rings. O-RINGS DISASSEMBLY Remove the three bolts and oil pump body C. Oil pump body C BOLTS may pop out by the spring force.
  • Page 108 '61HN252' by American Honda Motor Co. - Page 108 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Separate oil pump bodies A and B. PUMP BODY A Remove the outer, inner rotors A, drive pin and pump shaft. PUMP SHAFT Clean the all disassembled parts thoroughly.
  • Page 109 '61HN252' by American Honda Motor Co. - Page 109 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM ASSEMBLY Dip all parts in clean engine oil. OUTER ROTORS A PUMP BODY A PUMP BODY B RELIEF VALVE PUMP SHAFT SPRING SPRING SEAT...
  • Page 110 '61HN252' by American Honda Motor Co. - Page 110 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Install the pump spacer. DRIVE PIN INNER ROTOR C Install the drive pin and inner rotor C, aligning the pin grooves with the drive pin.
  • Page 111 '61HN252' by American Honda Motor Co. - Page 111 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LUBRICATION SYSTEM Install the oil pump onto the front crankcase and OIL PUMP BOLTS tighten the five bolts securely. Assemble the crankcases (page 13-16). 4-17...
  • Page 112 '61HN252' by American Honda Motor Co. - Page 112 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:43 PM...
  • Page 113: Fuel System

    '61HN252' by American Honda Motor Co. - Page 113 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM SYSTEM COMPONENTS ··························· 5-2 CARBURETOR ASSEMBLY ····················· 5-13 SERVICE INFORMATION ··························· 5-3 CARBURETOR INSTALLATION ··············· 5-18 TROUBLESHOOTING ································· 5-4 PILOT SCREW ADJUSTMENT ················ 5-19 AIR CLEANER HOUSING ···························...
  • Page 114 '61HN252' by American Honda Motor Co. - Page 114 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM FUELSYSTEM SYSTEM COMPONENTS 1.5 N·m (0.2 kgf·m, 1.1 lbf·ft) 4 N·m (0.4 kgf·m, 2.9 lbf·ft) 2.3 N·m (0.2 kgf·m, 1.7 lbf·ft) 1 of 1...
  • Page 115 '61HN252' by American Honda Motor Co. - Page 115 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM SERVICE INFORMATION GENERAL · Work in a well ventilated area. Smoking or allowing flames or sparks in the work area or where gasoline is stored can cause a fire or explosion.
  • Page 116: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 116 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM TROUBLESHOOTING Engine cranks but won't start · No fuel in tank · No fuel to carburetor Clogged fuel strainer Clogged fuel line Clogged fuel tank breather hose Misadjusted fuel level ·...
  • Page 117: Air Cleaner Housing

    '61HN252' by American Honda Motor Co. - Page 117 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM AIR CLEANER HOUSING REMOVAL/INSTALLATION Remove the following: TRIM CLIPS fuel tank cover (page 2-6) two trim clips Release the breather pipe clip from the stay on the muffler.
  • Page 118: Carburetor Removal

    '61HN252' by American Honda Motor Co. - Page 118 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Remove the bolts. BOLTS Remove the air cleaner housing from the frame. Install the air cleaner housing and connecting hose, and align the groove in the connecting hose with the lug on the air cleaner housing.
  • Page 119 '61HN252' by American Honda Motor Co. - Page 119 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Remove the screw and throttle drum cover. SCREW THROTTLE DRUM COVER Slide the rubber cap off the throttle cable adjuster. ADJUSTER THROTTLE CABLE...
  • Page 120 '61HN252' by American Honda Motor Co. - Page 120 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM CARBURETOR DISASSEMBLY/ INSPECTION STARTING ENRICHMENT (SE) VALVE INSPECTION Check the SE valve face for scores, scratches or wear. Check the SE valve seat at the tip of the valve for stepped wear.
  • Page 121 '61HN252' by American Honda Motor Co. - Page 121 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM AIR CUT-OFF VALVE (U type only) Remove the screw and the air cut-off valve from the SLOW AIR carburetor body. Remove the slow air jet and three O-rings.
  • Page 122 '61HN252' by American Honda Motor Co. - Page 122 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Check the jet needle for stepped wear. DIAPHRAGM/PISTON Check the vacuum piston for wear or damage. Check the diaphragm for pin hole, deterioration or damage.
  • Page 123 '61HN252' by American Honda Motor Co. - Page 123 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Check the diaphragm for holes, deterioration or damage. DIAPHRAGM FLOAT CHAMBER Remove the four screws and the float chamber. SCREWS FLOAT CHAMBER Remove the baffle plate.
  • Page 124 '61HN252' by American Honda Motor Co. - Page 124 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Check the float valve and valve seat for scoring, VALVE SEAT scratches, clogging or damage. Check the tip of the float valve, where it contacts the valve seat, for stepped wear or contamination.
  • Page 125: Carburetor Assembly

    '61HN252' by American Honda Motor Co. - Page 125 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM CARBURETOR ASSEMBLY DIAPHRAGM/ AIR VENT HOSES VACUUM PISTON VACUUM CHAMBER COVER JET NEEDLE AIR CUT-OFF VALVE CLIP FLOAT VALVE AIR BREAD HOSE FLOAT PIN...
  • Page 126 '61HN252' by American Honda Motor Co. - Page 126 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Hang the float valve onto the float arm lip. FLOAT FLOAT VALVE Install the float valve and float, and insert the float pin so that the spline end rests in the short boss (spline hole) side as shown.
  • Page 127 '61HN252' by American Honda Motor Co. - Page 127 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM PRIMER KNOB Install the spring primer knob assembly, and tighten SCREWS the two screws securely. PRIMER KNOB ASSEMBLY VACUUM CHAMBER Install a new O-ring into the air joint groove.
  • Page 128 '61HN252' by American Honda Motor Co. - Page 128 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Install the diaphragm/vacuum piston into the carbu- Be careful not to DIAPHRAGM/ damage the jet retor body by aligning the tab of the diaphragm...
  • Page 129 '61HN252' by American Honda Motor Co. - Page 129 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM AIR CUT-OFF VALVE (U type only) Install a new O-rings onto the slow air jet and air SLOW AIR cut-off valve. Install the slow air jet and air cut-off valve onto the...
  • Page 130: Carburetor Installation

    '61HN252' by American Honda Motor Co. - Page 130 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM CARBURETOR INSTALLATION Install the carburetor into the insulator, rest the car- buretor rib against the insulator lug and tighten the band screw. TORQUE: 4 N·m (0.4 kgf·m, 2.9 lbf·ft)
  • Page 131: Instructions

    '61HN252' by American Honda Motor Co. - Page 131 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Route the carburetor heater wire and carburetor drain hose properly (page 1-22). Connect the carburetor heater connector. Install the air cleaner housing (page 5-5).
  • Page 132: High Altitude Adjustment

    '61HN252' by American Honda Motor Co. - Page 132 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM HIGH ALTITUDE ADJUSTMENT (except U type) At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel consumption will increase. A very rich mix- ture will also foul the spark plug and cause hard starting.
  • Page 133: Fuel Tank

    '61HN252' by American Honda Motor Co. - Page 133 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM For use at low altitudes, you should return the car- buretor to original factory specifications. Replace the main jet with the standard main jet, and screw out the pilot screw the specified number of turns from the high altitude setting.
  • Page 134 '61HN252' by American Honda Motor Co. - Page 134 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Turn the fuel valve OFF and disconnect the fuel hose from the carburetor. FUEL HOSE Remove the two bolts and gearshift lever assembly.
  • Page 135 '61HN252' by American Honda Motor Co. - Page 135 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FUEL SYSTEM Remove the O-ring. Clean the fuel strainer screen with non-flammable or high flash point solvent. O-RING Dry the strainer screen thoroughly. Install a new O-ring onto the fuel valve.
  • Page 136 '61HN252' by American Honda Motor Co. - Page 136 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:46 PM...
  • Page 137: Cooling System

    '61HN252' by American Honda Motor Co. - Page 137 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM SYSTEM FLOW PATTERN ························· 6-2 RADIATOR RESERVE TANK ······················ 6-7 SERVICE INFORMATION ··························· 6-3 RADIATOR/COOLING FAN ························ 6-7 TROUBLESHOOTING ································· 6-3 THERMOSTAT ·········································· 6-10 SYSTEM TESTING······································...
  • Page 138 '61HN252' by American Honda Motor Co. - Page 138 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM COOLINGSYSTEM SYSTEM FLOW PATTERN RADIATOR RESERVE TANK WATER PUMP THERMOSTAT 1 of 1 3/9/2008 10:46 PM...
  • Page 139: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 139 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM SERVICE INFORMATION GENERAL Removing the radiator cap while the engine is hot can allow the coolant to spray out, seriously scalding you. Always let the engine and radiator cool down before removing the radiator cap.
  • Page 140: System Testing

    '61HN252' by American Honda Motor Co. - Page 140 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM SYSTEM TESTING Remove the screw and radiator cap lid from the SCREW RADIATOR front fender. CAP LID Remove the radiator cap. RADIATOR CAP COOLANT (HYDROMETER TEST) Test the coolant gravity using a hydrometer.
  • Page 141: Coolant Replacement

    '61HN252' by American Honda Motor Co. - Page 141 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM RADIATOR CAP/SYSTEM PRESSURE INSPECTION Pressure test the radiator cap using the tester. Before installing the TESTER cap in the tester, Replace the radiator cap if it does not hold pressure, or if relief pressure is too high or too low.
  • Page 142 '61HN252' by American Honda Motor Co. - Page 142 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM REPLACEMENT/AIR BLEEDING · When filling the system with a coolant, place the vehicle on a flat, level surface. Remove the radiator cap (page 6-4).
  • Page 143: Radiator Reserve Tank

    '61HN252' by American Honda Motor Co. - Page 143 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Install the radiator cap lid and tighten the screw. RADIATOR SCREW CAP LID RADIATOR CAP Fill the reserve tank to the upper level line with the UPPER LEVEL LINE vehicle on a flat, level surface.
  • Page 144 '61HN252' by American Honda Motor Co. - Page 144 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Disconnect the fan motor breather hose. UPPER RADIATOR MOUNTING BOLTS Disconnect the upper and lower radiator hoses. HOSE Remove the two mounting bolts and radiator assembly from the frame.
  • Page 145 '61HN252' by American Honda Motor Co. - Page 145 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM COOLING FAN ASSEMBLY FAN MOTOR SHROUD RADIATOR COOLING FAN Install the fan motor onto the shroud and tighten FAN MOTOR NUTS the three nuts securely.
  • Page 146 '61HN252' by American Honda Motor Co. - Page 146 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Install the fan shroud/motor assembly onto the radi- SHROUD/MOTOR BOLTS ator and tighten the three bolts. ASSEMBLY Clamp the fan motor wire. CLAMP...
  • Page 147 '61HN252' by American Honda Motor Co. - Page 147 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Remove the two bolts and thermostat cover. THERMOSTAT COVER BOLTS Remove the thermostat from the cylinder head. Remove the seal rubber from the thermostat.
  • Page 148: Water Pump

    '61HN252' by American Honda Motor Co. - Page 148 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Install the thermostat cover and tighten the two THERMOSTAT COVER BOLTS bolts. Install the air intake duct and tighten the band screw. Install the fuel tank cover (page 2-6).
  • Page 149 '61HN252' by American Honda Motor Co. - Page 149 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Disconnect the bypass hoses from the water pump. WATER PUMP Remove the three bolts and water pump. BYPASS (AIR BLEED) HOSE BOLTS Remove the water joint pipe and O-rings.
  • Page 150 '61HN252' by American Honda Motor Co. - Page 150 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] COOLING SYSTEM Install the three bolts and tighten them securely. WATER PUMP Connect the bypass hoses to the water pump. BYPASS (AIR BLEED) HOSE BOLTS...
  • Page 151: Engine Removal/Installation

    '61HN252' by American Honda Motor Co. - Page 151 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION SYSTEM COMPONENTS ··························· 7-2 ENGINE REMOVAL ···································· 7-4 SERVICE INFORMATION ··························· 7-3 ENGINE INSTALLATION···························· 7-8 1 of 1 3/9/2008 10:48 PM...
  • Page 152 '61HN252' by American Honda Motor Co. - Page 152 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION ENGINEREMOVAL/INSTALLATION SYSTEM COMPONENTS 54 N·m (5.5 kgf·m, 40 lbf·ft) 32 N·m (3.3 kgf·m, 54 N·m (5.5 kgf·m, 40 lbf·ft) 24 lbf·ft) 32 N·m (3.3 kgf·m, 24 lbf·ft) 18 N·m (1.8 kgf·m, 13 lbf·ft)
  • Page 153 '61HN252' by American Honda Motor Co. - Page 153 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION SERVICE INFORMATION GENERAL · When removing/installing the engine, tape the frame around the engine beforehand to protect the frame. · The following components require engine removal for service:...
  • Page 154 '61HN252' by American Honda Motor Co. - Page 154 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION ENGINE REMOVAL Drain the engine oil (page 3-14). Drain the coolant from the engine (page 6-5). GROUND CABLE TERMINAL Remove the following: left and right center mud guards...
  • Page 155 '61HN252' by American Honda Motor Co. - Page 155 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Pull the propeller shaft joint out of the output shaft. OUTPUT SHAFT BAND BOOT Remove the boot band from the dust boot and release the dust boot off the pinion joint of the front differential.
  • Page 156 '61HN252' by American Honda Motor Co. - Page 156 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Disconnect the engine coolant temperature (ECT) sensor connector. ECT SENSOR CONNECTOR Remove the bolts and oil pipes from the oil tank. BOLTS OIL PIPES...
  • Page 157 '61HN252' by American Honda Motor Co. - Page 157 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Remove the upper engine hanger bolts, nut, bracket BRACKET BOLT/NUT and mounting rubbers. MOUNTING RUBBERS BOLTS Remove the following: HANGER BOLT HANGER NUT...
  • Page 158: Engine Installation

    '61HN252' by American Honda Motor Co. - Page 158 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION ENGINE INSTALLATION Install the lower hanger bushings into the engine DUST SEAL LIPS lower mounts. Install the dust seals with the lip side facing out.
  • Page 159 '61HN252' by American Honda Motor Co. - Page 159 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Install the mounting rubbers on the upper hanger BRACKET BOLT/NUT bushing with the large I.D. side facing in. Install the upper engine hanger bracket and bolts.
  • Page 160 '61HN252' by American Honda Motor Co. - Page 160 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Connect the engine coolant temperature (ECT) sen- sor connector. ECT SENSOR CONNECTOR Connect the upper and lower radiator hose to the RADIATOR HOSES thermostat cover and water pump.
  • Page 161 '61HN252' by American Honda Motor Co. - Page 161 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Coat new O-rings with grease and install it onto the pivot bolt. O-RINGS Apply grease to the pivot bolt groove and install the washer, linkage lever and pivot bolt.
  • Page 162 '61HN252' by American Honda Motor Co. - Page 162 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ENGINE REMOVAL/INSTALLATION Connect the angle sensor and control motor con- CONTROL MOTOR nectors, and secure their wires with the wire clip CONNECTOR and band. ANGLE...
  • Page 163: Cylinder Head/Valve/Camshaft

    '61HN252' by American Honda Motor Co. - Page 163 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT SYSTEM COMPONENTS ··························· 8-2 VALVE GUIDE REPLACEMENT ··············· 8-12 SERVICE INFORMATION ··························· 8-3 VALVE SEAT INSPECTION/REFACING ·· 8-13 TROUBLESHOOTING ································· 8-5 CAMSHAFT REMOVAL···························· 8-15 CYLINDER COMPRESSION························...
  • Page 164 '61HN252' by American Honda Motor Co. - Page 164 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT CYLINDERHEAD/VALVE/CAMSHAFT SYSTEM COMPONENTS 53 N·m (5.4 kgf·m, 39 lbf·ft) 32 N·m (3.3 kgf·m, 24 lbf·ft) 10 N·m (1.0 kgf·m, 7 lbf·ft) 22 N·m (2.2 kgf·m, 16 lbf·ft)
  • Page 165 '61HN252' by American Honda Motor Co. - Page 165 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT SERVICE INFORMATION GENERAL · This section covers service of the rocker arms, cylinder head, valves and camshaft. These services can be done with the engine installed in the frame.
  • Page 166 '61HN252' by American Honda Motor Co. - Page 166 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT TOOLS Valve spring compressor Valve guide remover, 5.5 mm Valve guide reamer, 5.5 mm 07757-0010000 07742-0010100 07984-2000001 or 07984-200000D (U.S.A. only) Flat cutter, 36 mm (IN 32°) Flat cutter, 33 mm (EX 32°)
  • Page 167 '61HN252' by American Honda Motor Co. - Page 167 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT TROUBLESHOOTING · Engine top-end problems usually affect engine performance. These can be diagnosed by a compression test, or by trac- ing top-end noise with a sounding rod or stethoscope.
  • Page 168: Cylinder Compression

    '61HN252' by American Honda Motor Co. - Page 168 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT CYLINDER COMPRESSION Warm up the engine to normal operating tempera- COMPRESSION GAUGE ture. Stop the engine, disconnect the spark plug cap and remove the spark plug (page 3-9).
  • Page 169 '61HN252' by American Honda Motor Co. - Page 169 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Remove the spark plug cap. CAP NUTS/WASHERS HEAD COVER Remove the seven bolts, three sealing washers, four cap nuts, washers and the cylinder head cover.
  • Page 170: Cylinder Head Removal

    '61HN252' by American Honda Motor Co. - Page 170 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT INSPECTION ROCKER ARM/SHAFT Check the rocker arms and shafts for wear or dam- age. If the rocker arm follower is worn or damaged, check the push rod and oil passages.
  • Page 171: Cylinder Head Disassembly

    '61HN252' by American Honda Motor Co. - Page 171 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Remove the spark plug. BAND SCREW Loosen the band screw and remove the carburetor insulator if necessary. Remove the engine coolant temperature (ECT) sen- sor if necessary.
  • Page 172 '61HN252' by American Honda Motor Co. - Page 172 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Remove the following: Mark all parts so they can be placed VALVE spring retainer back in their original inner and outer valve springs SPRING SEAT locations.
  • Page 173 '61HN252' by American Honda Motor Co. - Page 173 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Measure each follower bore I.D. SERVICE LIMIT: 22.54 mm (0.887 in) Subtract each follower O.D. from the corresponding bore I.D. to obtain the rocker arm-to-shaft clearance.
  • Page 174: Valve Guide Replacement

    '61HN252' by American Honda Motor Co. - Page 174 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Subtract each valve stem O.D. from the correspond- ing guide I.D. to obtain the stem-to-guide clearance. SERVICE LIMITS: IN: 0.12 mm (0.005 in) EX: 0.14 mm (0.006 in)
  • Page 175: Valve Seat Inspection/Refacing

    '61HN252' by American Honda Motor Co. - Page 175 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT VALVE SEAT INSPECTION/REFACING INSPECTION Clean all intake and exhaust valves thoroughly to remove carbon deposits. Apply a light coating of Prussian Blue to each valve seat.
  • Page 176: Instructions

    '61HN252' by American Honda Motor Co. - Page 176 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT REFACING · Follow the refacer manufacturer's operating instructions. · Be careful not to grind the seat more than neces- sary. 45° 60° 32°...
  • Page 177: Camshaft Removal

    '61HN252' by American Honda Motor Co. - Page 177 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Using a 60° interior cutter, remove 1/4 of the exist- ing valve seat material. OLD SEAT WIDTH TOOLS: Interior cutter, 34 mm (IN)
  • Page 178 '61HN252' by American Honda Motor Co. - Page 178 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Turn the cam chain tensioner lifter shaft clockwise fully and secure it with a stopper tool. TOOL: Cam chain tensioner stopper 07NMG-MY90101 or 07ZMG-MCAA400 (U.S.A.
  • Page 179: Camshaft Installation

    '61HN252' by American Honda Motor Co. - Page 179 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Turn the camshaft holder to check the bearing. The bearing should turn smoothly and quietly. Replace the camshaft assembly if the bearing does not turn smoothly and quietly.
  • Page 180 '61HN252' by American Honda Motor Co. - Page 180 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Install and tighten the four camshaft holder bolts. Apply molybdenum oil solution to the cam lobes. CAM LOBES BOLTS Remove the stopper tool from the cam chain ten-...
  • Page 181: Cylinder Head Assembly

    '61HN252' by American Honda Motor Co. - Page 181 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT CYLINDER HEAD ASSEMBLY COTTERS SPRING RETAINER OUTER SPRING INNER SPRING STEM SEAL SPRING SEAT VALVE GUIDE INTAKE VALVE EXHAUST VALVE Blow through the oil passage (stud bolt hole) in the cylinder head with compressed air.
  • Page 182: Cylinder Head Installation

    '61HN252' by American Honda Motor Co. - Page 182 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Install the valve spring cotters using the valve Grease the cotters SPRING COMPRESSOR spring compressor. to ease installation. To prevent loss of tension, do not...
  • Page 183 '61HN252' by American Honda Motor Co. - Page 183 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT If the ECT sensor was removed, apply sealant to the ECT sensor threads. Do not apply sealant to the sen- ECT SENSOR sor head.
  • Page 184 '61HN252' by American Honda Motor Co. - Page 184 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT CYLINDER HEAD COVER ASSEMBLY/ INSTALLATION ASSEMBLY SETTING BOLT SEALING WASHER ROCKER ARM SHAFT INTAKE ROCKER ARM O-RING EXHAUST ROCKER ARM Coat new O-rings with oil and install them onto the rocker arm shaft grooves.
  • Page 185 '61HN252' by American Honda Motor Co. - Page 185 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT INSTALLATION Install the dowel pins and a new gasket. PUSH RODS Install the push rods into the cam followers rest GASKET them into the gasket grooves as shown.
  • Page 186 '61HN252' by American Honda Motor Co. - Page 186 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER HEAD/VALVE/CAMSHAFT Install the wire clamp to the fuel tank heat guard. THROTTLE CABLE HEAT Install the fuel tank heat guard. GUARD Install the upper radiator hose, choke and throttle SE VALVE CABLE cables onto the fuel tank heat guard properly.
  • Page 187: Cylinder/Piston

    '61HN252' by American Honda Motor Co. - Page 187 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON SYSTEM COMPONENTS ··························· 9-2 CYLINDER/PISTON REMOVAL ················· 9-5 SERVICE INFORMATION ··························· 9-3 CYLINDER/PISTON INSTALLATION········· 9-9 TROUBLESHOOTING ································· 9-4 1 of 1 3/9/2008 10:51 PM...
  • Page 188: System Components

    '61HN252' by American Honda Motor Co. - Page 188 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON CYLINDER/PISTON SYSTEM COMPONENTS 1 of 1 3/9/2008 10:52 PM...
  • Page 189: Service Information

    '61HN252' by American Honda Motor Co. - Page 189 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON SERVICE INFORMATION GENERAL · The cylinder and piston can be serviced with the engine installed in the frame. · Take care not to damage the cylinder wall and piston.
  • Page 190: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 190 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON TROUBLESHOOTING Compression too low, hard starting or poor performance at low speed · Leaking cylinder head gasket · Worn, stuck or broken piston ring ·...
  • Page 191: Cylinder/Piston Removal

    '61HN252' by American Honda Motor Co. - Page 191 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON CYLINDER/PISTON REMOVAL CYLINDER REMOVAL Remove the cylinder head (page 8-8). TENSIONER LIFTER Remove the cam chain tensioner lifter sealing bolt. SEALING BOLT Turn the tensioner shaft clockwise with the stopper...
  • Page 192 '61HN252' by American Honda Motor Co. - Page 192 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON Remove the gasket and dowel pins. DOWEL PINS Remove the cam chain guide. GASKET CAM CHAIN GUIDE PISTON REMOVAL Place a clean shop towel over the crankcase to pre- PISTON vent the clip from falling into the crankcase.
  • Page 193 '61HN252' by American Honda Motor Co. - Page 193 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON INSPECTION CYLINDER Inspect the cylinder bore for scratch or wear. Measure the cylinder I.D. at three levels in an X and Y axis. Take the maximum reading to determine the cylin- der wear.
  • Page 194 '61HN252' by American Honda Motor Co. - Page 194 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON Insert each piston ring into the bottom of the cylin- der squarely using the piston. Measure the ring end gap. SERVICE LIMITS: Top: 0.5 mm (0.02 in) Second:0.6 mm (0.02 in)
  • Page 195: Cylinder/Piston Installation

    '61HN252' by American Honda Motor Co. - Page 195 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON CYLINDER/PISTON INSTALLATION PISTON RING INSTALLATION Be careful not to Carefully install the piston rings into the piston ring grooves with the markings facing up.
  • Page 196 '61HN252' by American Honda Motor Co. - Page 196 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON CYLINDER INSTALLATION Clean the gasket surfaces of the cylinder and crank- CAM CHAIN GUIDE case thoroughly, being careful not to damage them, and being careful not to allow gasket material into the crankcase.
  • Page 197 '61HN252' by American Honda Motor Co. - Page 197 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CYLINDER/PISTON Remove the sealing bolt and washer from the cam TENSIONER LIFTER chain tensioner lifter. Turn the cam chain tensioner lifter shaft clockwise fully to retract the tensioner lifter and secure it with a stopper tool.
  • Page 198 '61HN252' by American Honda Motor Co. - Page 198 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:53 PM...
  • Page 199: Centrifugal Clutch

    '61HN252' by American Honda Motor Co. - Page 199 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH COMPONENT LOCATION ························ 10-2 FRONT CRANKCASE COVER ·················· 10-5 SERVICE INFORMATION ························· 10-3 CENTRIFUGAL CLUTCH ·························· 10-9 TROUBLESHOOTING ······························· 10-4 10-1 1 of 1...
  • Page 200 '61HN252' by American Honda Motor Co. - Page 200 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH CENTRIFUGALCLUTCH COMPONENT LOCATION 118 N·m (12.0 kgf·m, 87 lbf·ft) 18 N·m (1.8 kgf·m, 13 lbf·ft) 10-2 1 of 1 3/9/2008 10:53 PM...
  • Page 201 '61HN252' by American Honda Motor Co. - Page 201 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH SERVICE INFORMATION GENERAL · This section covers service of the centrifugal clutch and change clutch. These parts can be serviced with the engine installed in the frame.
  • Page 202: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 202 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Remover weight Driver Attachment, 42 x 47 mm 07741-0010201 07749-0010000 07746-0010300 or 07936-3710200 or 07936-371020A (U.S.A. only) Pilot, 17 mm Pilot, 22 mm...
  • Page 203: Front Crankcase Cover

    '61HN252' by American Honda Motor Co. - Page 203 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH FRONT CRANKCASE COVER REMOVAL Remove the following: STAY COLLARS front mud guards (page 2-8) inner fenders (page 2-9) gearshift linkage (page 7-5) oil tank...
  • Page 204 '61HN252' by American Honda Motor Co. - Page 204 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Remove the oil joint pipe and O-rings. OIL JOINT PIPE/O-RINGS O-RING BEARING INSPECTION/ REPLACEMENT Turn the inner race of each bearing with your finger.
  • Page 205 '61HN252' by American Honda Motor Co. - Page 205 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Drive a new crankshaft bearing in with the sealed side facing down, using the special tools. DRIVER TOOLS: Driver 07749-0010000 Attachment, 42 x 47 mm...
  • Page 206 '61HN252' by American Honda Motor Co. - Page 206 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Coat new O-rings with oil and install them onto the oil joint pipe. O-RINGS Install the oil joint pipe into the crankcase. OIL JOINT PIPE...
  • Page 207 '61HN252' by American Honda Motor Co. - Page 207 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Coat a new O-ring with oil and install it onto the oil feed pipe setting cap. O-RING Install and tighten the setting cap.
  • Page 208 '61HN252' by American Honda Motor Co. - Page 208 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Remove the centrifugal clutch assembly using the CENTRIFUGAL CLUTCH ASSEMBLY special tool. TOOL: Outside screw puller, 07ZMC-HN20100 or 40 x 1.5 mm 07ZMC-HN2A100 (U.S.A.
  • Page 209 '61HN252' by American Honda Motor Co. - Page 209 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH CRANKSHAFT Check the clutch drum sliding surface of the crank- shaft for scratches or abnormal wear. Measure the crankshaft O.D. SERVICE LIMIT: 28.93 mm (1.139 in) DRIVE PLATE ASSEMBLY Measure the clutch lining thickness of the weight.
  • Page 210 '61HN252' by American Honda Motor Co. - Page 210 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Remove the clutch weights and springs from the WEIGHTS drive plate. SPRINGS Measure the clutch weight spring free length. Replace the clutch weight springs as a SERVICE LIMIT: 24.1 mm (0.95 in)
  • Page 211 '61HN252' by American Honda Motor Co. - Page 211 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Install the clutch weights and springs onto the drive Install with the spring's open ends plate as shown. WEIGHTS facing in. SPRINGS Install the following:...
  • Page 212 '61HN252' by American Honda Motor Co. - Page 212 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Apply engine oil to the sprag clutch contacting sur- face of the drive plate boss. DRIVER PLATE Install the drive plate assembly into the clutch drum while turning it counterclockwise.
  • Page 213 '61HN252' by American Honda Motor Co. - Page 213 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CENTRIFUGAL CLUTCH Stake the clutch lock nut into the crankshaft groove. Be careful not to Stake damage the Install the front crankcase cover (page 10-7).
  • Page 214 '61HN252' by American Honda Motor Co. - Page 214 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:55 PM...
  • Page 215: Alternator/Starter Clutch

    '61HN252' by American Honda Motor Co. - Page 215 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH SYSTEM COMPONENTS ························· 11-2 RECOIL STARTER····································· 11-5 SERVICE INFORMATION ························· 11-3 ALTERNATOR STATOR ··························· 11-8 TROUBLESHOOTING ······························· 11-4 FLYWHEEL/STARTER CLUTCH ············ 11-12 11-1...
  • Page 216 '61HN252' by American Honda Motor Co. - Page 216 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH ALTERNATOR/STARTERCLUTCH SYSTEM COMPONENTS 108 N·m (11.0 kgf·m, 80 lbf·ft) 11-2 1 of 1 3/9/2008 10:55 PM...
  • Page 217 '61HN252' by American Honda Motor Co. - Page 217 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH SERVICE INFORMATION GENERAL · This section covers service of the recoil starter, alternator stator and flywheel/starter clutch. These parts can be serviced with the engine installed in the frame.
  • Page 218: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 218 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Remover weight Bearing remover shaft, 10 mm Bearing remover head, 10 mm 07741-0010201 07936-GE00100 07936-GE00200 or 07936-3710200 or 07936-371020A (U.S.A. only) TROUBLESHOOTING Starter motor turns, but engine does not turn ·...
  • Page 219: Recoil Starter

    '61HN252' by American Honda Motor Co. - Page 219 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH RECOIL STARTER REMOVAL Remove the air cleaner housing (page 5-5). Remove the four mounting bolts and the recoil starter assembly. RECOIL STARTER DISASSEMBLY Remove the bolt and ratchet cover.
  • Page 220 '61HN252' by American Honda Motor Co. - Page 220 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Remove the starter rope from the drive pulley. Check the starter rope for wear or damage. ROPE DRIVE PULLEY Check the recoil starter spring and replace it with a new one if it is damaged or broken.
  • Page 221 '61HN252' by American Honda Motor Co. - Page 221 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Apply grease to the drive pulley shaft. Set the starter rope into the pulley cutout and install DRIVE PULLEY CUTOUT the pulley while hooking the spring inner end onto the pulley hook.
  • Page 222: Alternator Stator

    '61HN252' by American Honda Motor Co. - Page 222 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Install the friction spring onto the ratchet cover. Install the ratchet cover, aligning the flats on the FRICTION SPRING RATCHET COVER boss so that the friction spring loop is against the ratchet pawl.
  • Page 223 '61HN252' by American Honda Motor Co. - Page 223 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Hold the recoil starter driven pulley using the spe- RECOIL PULLEY HOLDER cial tool and loosen the bolt. TOOL: Recoil pulley holder 07SMB-HM70100 Remove the bolt, O-ring and the driven pulley.
  • Page 224 '61HN252' by American Honda Motor Co. - Page 224 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Remove the wire grommet from the alternator STATOR BOLTS cover groove. Remove the three bolts and alternator stator. Install the alternator stator onto the cover and tighten the three bolts.
  • Page 225 '61HN252' by American Honda Motor Co. - Page 225 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Install the starter driven pulley aligning the bosses with the grooves in the crankshaft. DRIVEN PULLEY Align Coat a new O-ring with oil and install it onto the DRIVEN PULLEY driven pulley bolt.
  • Page 226: Flywheel/Starter Clutch

    '61HN252' by American Honda Motor Co. - Page 226 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH FLYWHEEL/STARTER CLUTCH REMOVAL Remove the following: REDUCTION GEAR A SHAFT alternator cover (page 11-8) starter reduction gear A and shaft washer and starter reduction gear C...
  • Page 227 '61HN252' by American Honda Motor Co. - Page 227 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Hold the flywheel with the special tool and remove the starter clutch bolts. STARTER CLUTCH BOLTS TOOL: Flywheel holder 07725-0040000 or equivalent commer- cially available in U.S.A.
  • Page 228 '61HN252' by American Honda Motor Co. - Page 228 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Apply locking agent to the starter clutch bolt STARTER threads. CLUTCH Install the starter clutch assembly onto the flywheel BOLTS and install the bolts.
  • Page 229 '61HN252' by American Honda Motor Co. - Page 229 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ALTERNATOR/STARTER CLUTCH Loosen the starter driven pulley bolt, and remove STARTER MOTOR the pulley holder, bolt and pulley. SHAFT BEARING Check the starter motor shaft bearing.
  • Page 230 '61HN252' by American Honda Motor Co. - Page 230 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:56 PM...
  • Page 231: Sub-Transmission/Gearshift Linkage

    '61HN252' by American Honda Motor Co. - Page 231 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE SYSTEM COMPONENTS ························· 12-2 GEARSHIFT LINKAGE ······························ 12-8 SERVICE INFORMATION ························· 12-3 SUB-TRANSMISSION ···························· 12-12 TROUBLESHOOTING ······························· 12-5 GEARSHIFT LEVER LINKAGE ··············· 12-15 REAR CRANKCASE COVER ·····················...
  • Page 232 '61HN252' by American Honda Motor Co. - Page 232 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE SUB-TRANSMISSION/GEARSHIFTLINKAGE SYSTEM COMPONENTS 12 N·m (1.2 kgf·m, 9 lbf·ft) 12-2 1 of 1 3/9/2008 10:57 PM...
  • Page 233 '61HN252' by American Honda Motor Co. - Page 233 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE SERVICE INFORMATION GENERAL · This section covers service of the gearshift lever linkage and sub-transmission. The shift lever linkage can be serviced with the engine installed in the frame. To service sub-transmission, the engine must be removed from the frame.
  • Page 234 '61HN252' by American Honda Motor Co. - Page 234 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE TOOLS Bearing remover, 17 mm Bearing remover, 20 mm Remover handle 07936-3710300 07936-3710600 07936-3710100 Remover weight Driver Attachment, 37 x 40 mm 07741-0010201...
  • Page 235: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 235 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE TROUBLESHOOTING Hard to shift · Bent shift forks · Bent shift fork shaft · Bent shift fork shaft · Damaged shift drum cam grooves ·...
  • Page 236: Rear Crankcase Cover

    '61HN252' by American Honda Motor Co. - Page 236 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE REAR CRANKCASE COVER REMOVAL Remove the following: BOLTS engine from the frame (page 7-4) alternator cover (page 11-8) starter reduction gears and shafts...
  • Page 237 '61HN252' by American Honda Motor Co. - Page 237 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Remove the mainshaft and countershaft bearings REMOVER WEIGHT MAINSHAFT using the special tools. BEARING TOOLS: Mainshaft bearing: Bearing remover, 17 mm 07936-3710300 Remover handle...
  • Page 238: Gearshift Linkage

    '61HN252' by American Honda Motor Co. - Page 238 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE INSTALLATION Install the oil joint collar. JOINT COLLAR/ SHIFT DRUM Coat a new O-ring with oil and install it onto the O-RING joint collar.
  • Page 239 '61HN252' by American Honda Motor Co. - Page 239 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Align the index lug of the shift drum with the index line on the gearshift spindle. SHIFT DRUM INDEX LUG INDEX LINE GEARSHIFT SPINDLE...
  • Page 240 '61HN252' by American Honda Motor Co. - Page 240 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Measure the shift fork shaft O.D. SERVICE LIMIT: 10.96 mm (0.431 in) Check the shift drum guide grooves for abnormal wear or damage.
  • Page 241 '61HN252' by American Honda Motor Co. - Page 241 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE INSTALLATION Apply locking agent to the stopper arm pivot bolt RETURN SPRING threads. PIVOT BOLT Install the return spring as shown. Install the washer, stopper arm and pivot bolt, and tighten the bolt.
  • Page 242 '61HN252' by American Honda Motor Co. - Page 242 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Install the output shaft into the crankcase and the DRIVEN GEAR output driven gear onto the shaft with the large raised side facing out.
  • Page 243 '61HN252' by American Honda Motor Co. - Page 243 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE INSPECTION COUNTERSHAFT Check the gear dogs and teeth for abnormal wear or damage. Measure the gear I.D. SERVICE LIMIT: D., R., L.: 28.07 mm (1.105 in) Check the gear bushings for scratches or damage.
  • Page 244 '61HN252' by American Honda Motor Co. - Page 244 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE ASSEMBLY L. GEAR BUSHING L. GEAR R./L. GEAR SHIFTER THRUST WASHER R. GEAR G. GEAR COUNTERSHAFT D./R. GEAR BUSHING D. GEAR SHIFTER OUTPUT DRIVE GEAR...
  • Page 245: Gearshift Lever Linkage

    '61HN252' by American Honda Motor Co. - Page 245 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Install the countershaft assembly and reverse idle REVERSE IDLE GEAR gear as a set. COUNTERSHAFT ASSEMBLY Install the mainshaft onto the automatic transmis- WASHERS sion unit and into the crankcase.
  • Page 246 '61HN252' by American Honda Motor Co. - Page 246 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE DISASSEMBLY Shift the sub-transmission into neutral. WASHER Remove the following: GEARSHIFT ARM left front mud guard (page 2-8) front fender (page 2-11) pivot bolt, O-ring and washer...
  • Page 247 '61HN252' by American Honda Motor Co. - Page 247 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Remove the shift lever box from the base bracket. DETENT PLUNGER LEVER BOX Check that the detent plunger moves smoothly. Check the plunger sliding surface of the shift lever box for abnormal wear or damage.
  • Page 248 '61HN252' by American Honda Motor Co. - Page 248 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Install the tie-rods into the gearshift arm, linkage arm and lever assembly. Adjust the tie-rod length to the specified value. 58.5 ± 0.5 mm (2.30 ±...
  • Page 249 '61HN252' by American Honda Motor Co. - Page 249 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SUB-TRANSMISSION/GEARSHIFT LINKAGE Remove the cotter pin and washer. Be sure to center SLIDE SHAFT the slide shaft of the spring guide slot when the COTTER PIN gear position is in neutral.
  • Page 250 '61HN252' by American Honda Motor Co. - Page 250 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 10:59 PM...
  • Page 251: Crankshaft/Automatic Transmission

    '61HN252' by American Honda Motor Co. - Page 251 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION SYSTEM COMPONENTS ························· 13-2 AUTOMATIC TRANSMISSION UNIT AND CRANKSHAFT ········································ 13-10 SERVICE INFORMATION ························· 13-3 CRANKCASE BEARING REPLACEMENT13-13 TROUBLESHOOTING ······························· 13-6 CRANKCASE ASSEMBLY ······················ 13-16 CRANKCASE SEPARATION ·····················...
  • Page 252 '61HN252' by American Honda Motor Co. - Page 252 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION CRANKSHAFT/AUTOMATICTRANSMISSION SYSTEM COMPONENTS 17 N·m (1.7 kgf·m, 12 lbf·ft) 12 N·m (1.2 kgf·m, 9 lbf·ft) 13-2 1 of 1 3/9/2008 10:59 PM...
  • Page 253 '61HN252' by American Honda Motor Co. - Page 253 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION SERVICE INFORMATION GENERAL · The crankcase halves must be separated to service the crankshaft and automatic transmission (mainshaft). To service these parts, the engine must be removed from the frame (page 7-4).
  • Page 254 '61HN252' by American Honda Motor Co. - Page 254 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION TOOLS Bearing remover, 17 mm Remover handle Remover weight 07936-3710300 07936-3710100 07741-0010201 or 07936-3710200 or 07936-371020A (U.S.A. only) Bearing remover, 20 mm Driver...
  • Page 255 '61HN252' by American Honda Motor Co. - Page 255 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION Pilot, 25 mm Pilot, 30 mm Pilot, 32 mm 07746-0040600 07746-0040700 07MAD-PR90200 Pilot, 40 mm Assembly collar Thread shaft 07746-0040900 07965-VM00100 07965-VM00200 or Puller shaft (07931-ME4010B) and Special nut (07931-HB3020A) (U.S.A.
  • Page 256: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 256 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION TROUBLESHOOTING · Before starting this diagnostic troubleshooting, make sure that the gear position indicator is not blinking "--" (Electrical system of the Hondamatic is normal) and all the engine maintenance items have been performed and are within specifications.
  • Page 257 '61HN252' by American Honda Motor Co. - Page 257 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION Vehicle does not move 1. Oil level inspection Check the oil level (page 3-12). Is the oil level correct? Fill the crankcase with recommended oil (page 3-12) GO TO STEP 2.
  • Page 258: Crankcase Separation

    '61HN252' by American Honda Motor Co. - Page 258 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION CRANKCASE SEPARATION Remove the following: ANGLE SENSOR JOINT engine (page 7-4) cylinder head and camshaft (page 8-8) cylinder and piston (page 9-5) centrifugal clutch...
  • Page 259 '61HN252' by American Honda Motor Co. - Page 259 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION Loosen the five rear crankcase bolts in a crisscross REAR CRANKCASE pattern in several steps and remove them. BOLTS Loosen the twelve front crankcase bolts in a criss- FRONT CRANKCASE cross pattern in several steps and remove them.
  • Page 260 '61HN252' by American Honda Motor Co. - Page 260 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION UNIT AND CRANKSHAFT AUTOMATIC TRANSMISSION UNIT REMOVAL · Do not disassemble the automatic transmission unit. Separate the crankcase (page 13-8). BOLTS...
  • Page 261 '61HN252' by American Honda Motor Co. - Page 261 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION INSPECTION CRANKSHAFT Set the crankshaft as shown and measure the runout using a dial indicator. SERVICE LIMIT: 0.15 mm (0.006 in) 6 mm...
  • Page 262 '61HN252' by American Honda Motor Co. - Page 262 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION CRANKSHAFT AND BALANCER INSTALLATION Apply engine oil to a new rear crankshaft bearing. DRIVER Drive the crankshaft bearing into the rear crankcase with the marking side facing up.
  • Page 263: Crankcase Bearing Replacement

    '61HN252' by American Honda Motor Co. - Page 263 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION UNIT INSTALLATION Before installing the automatic transmission unit, PUMP SWASH PUMP/MOTOR SHAFT check the following components for smooth opera- PLATE ASSEMBLY tion.
  • Page 264 '61HN252' by American Honda Motor Co. - Page 264 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION Remove the shift drum and countershaft bearings SHIFT DRUM COUNTERSHAFT with the special tools. BEARING BEARING TOOLS: Shift drum bearing: Bearing remover, 17 mm...
  • Page 265 '61HN252' by American Honda Motor Co. - Page 265 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION Remove the output shaft oil seal. OUTPUT SHAFT OIL SEAL Remove the balancer bearing with the special tools. BALANCER BEARING TOOLS: Balancer bearing:...
  • Page 266: Crankcase Assembly

    '61HN252' by American Honda Motor Co. - Page 266 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION CRANKCASE ASSEMBLY Clean the front and rear crankcase mating surfaces INNER RACE thoroughly, being careful not to damage them. Blow through the oil passage in the rear crankcase (Mating surface) with compressed air.
  • Page 267 '61HN252' by American Honda Motor Co. - Page 267 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] CRANKSHAFT/AUTOMATIC TRANSMISSION Install the following: TENSIONER WASHER/COLLAR pivot collar (into the tensioner pivot) cam chain tensioner with bolt and washer (between the tensioner and crankcase)
  • Page 268 '61HN252' by American Honda Motor Co. - Page 268 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:01 PM...
  • Page 269: Front Wheel/Suspension/Steering

    '61HN252' by American Honda Motor Co. - Page 269 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING SYSTEM COMPONENTS ························· 14-2 TIRES······················································· 14-13 SERVICE INFORMATION ························· 14-3 FRONT WHEEL HUB ······························ 14-16 TROUBLESHOOTING ······························· 14-5 SUSPENSION ARM································ 14-17 HANDLEBAR ············································· 14-6 STEERING SHAFT ··································...
  • Page 270 '61HN252' by American Honda Motor Co. - Page 270 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING FRONTWHEEL/SUSPENSION/STEERING SYSTEM COMPONENTS 44 N·m (4.5 kgf·m, 33 lbf·ft) 39 N·m (2.6 kgf·m, 19 lbf·ft) 44 N·m (4.5 kgf·m, 33 lbf·ft) 25 N·m (2.6 kgf·m, 19 lbf·ft)
  • Page 271 Adjust toe whenever the tie-rod, knuckle or steering shaft are replaced or removed (page 3-26). · Do not twist or bend the brake hose and pipe when serving. · Use genuine Honda replacement bolts and nuts for all suspension pivots and mounting points. · Refer to 16-3 for brake system information.
  • Page 272 '61HN252' by American Honda Motor Co. - Page 272 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING TOOLS Ball joint remover, 28 mm Ball joint remover/installer Oil seal driver 07MAC-SL00201 07WMF-HN00100 07JAD-PH80101 07MAC-SL0202(U.S.A.only) or 07MAC-SL00200 and 07MAC-SL0A300 (U.S.A.only) Driver Attachment, 28 x 30 mm...
  • Page 273: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 273 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING ATV Bead Buster KLS379024 (U.S.A. only) TROUBLESHOOTING Hard steering · Steering shaft holder too tight · Damaged steering shaft bearing/bushing · Insufficient tire pressure Steers one side or does not track straight ·...
  • Page 274 '61HN252' by American Honda Motor Co. - Page 274 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING HANDLEBAR REMOVAL Remove the following: WIRE BANDS four wire bands breather hose BREATHER HOSE two screws MASTER CYLINDER THROTTLE HOUSING throttle housing holder...
  • Page 275 '61HN252' by American Honda Motor Co. - Page 275 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING CHOKE KNOB choke knob bolts HANDLEBAR GRIP BOLT grip ends handlebar grips GRIP END screw HANDLEBAR UPPER COVER handlebar upper cover SCREW two nuts...
  • Page 276 '61HN252' by American Honda Motor Co. - Page 276 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING two bolts BOLTS handlebar rear cover HANDLEBAR REAR COVER four bolts BOLTS handlebar upper holders handlebar HANDLEBAR UPPER HOLDERS INSTALLATION Place the handlebar onto the lower holders and...
  • Page 277 '61HN252' by American Honda Motor Co. - Page 277 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the handlebar front cover and tighten the two HANDLEBAR FRONT COVER nuts. NUTS Install the handlebar upper cover and tighten the HANDLEBAR UPPER COVER screw.
  • Page 278 '61HN252' by American Honda Motor Co. - Page 278 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the handlebar switch and loosely tighten the HANDLEBAR SWITCH three screws. SCREWS Install the brake lever bracket and holder with the LEVER BRACKET...
  • Page 279: Throttle Housing

    '61HN252' by American Honda Motor Co. - Page 279 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the breather hose. WIRE BANDS Install the four wire bands as shown. BREATHER HOSE THROTTLE HOUSING DISASSEMBLY Remove the following: COVER three screws...
  • Page 280: Front Wheel

    '61HN252' by American Honda Motor Co. - Page 280 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the throttle housing cover with a new gasket. COVER GASKET Install and tighten the three screws. Adjust the throttle lever free play (page 3-5).
  • Page 281 '61HN252' by American Honda Motor Co. - Page 281 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING TIRES REMOVAL (U.S.A. only) · This service requires the ATV Bead Buster (KLS379024). · Remove and install the tire from the rim side opposite the valve stem.
  • Page 282: Instructions

    '61HN252' by American Honda Motor Co. - Page 282 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Pull the leverage bar down so the breaker shoe is Failure to back out the breaker shoe just below the rim lip. Turn the crank to fully push LEVERAGE BAR the breaker shoe between the tire bead and rim.
  • Page 283 '61HN252' by American Honda Motor Co. - Page 283 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Trim the plug 6 mm (1/4 in) above the tire surface. Repeat the above procedure if the puncture is large. Do not use more than two plugs per injury.
  • Page 284: Front Wheel Hub

    '61HN252' by American Honda Motor Co. - Page 284 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING FRONT WHEEL HUB REMOVAL Remove the front wheel (page 14-12). Remove the front brake caliper (page 16-14). Remove the cotter pin, nut and front wheel hub.
  • Page 285: Suspension Arm

    '61HN252' by American Honda Motor Co. - Page 285 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the brake disc and tighten the new disc plate bolts to the specified torque. BOLTS TORQUE: 42 N·m (4.3 kgf·m, 31 lbf·ft)
  • Page 286: Instructions

    '61HN252' by American Honda Motor Co. - Page 286 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Remove the cotter pins and loosen the ball joint cas- CASTLE NUTS tle nuts, but do not remove them yet. COTTER PINS Release the ball joints, using the special tool accord- ing to the following instructions.
  • Page 287 '61HN252' by American Honda Motor Co. - Page 287 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Once the tool is in place, turn the adjusting bolt as PRESSURE BOLT necessary to make the jaws parallel. Then hand-tighten the pressure bolt and recheck the jaws to make sure they are still parallel.
  • Page 288 '61HN252' by American Honda Motor Co. - Page 288 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING INSPECTION UPPER/LOWER ARM Remove the dust seal caps and pivot collar from the PIVOT BUSHINGS PIVOT COLLAR upper arm. Check the pivot bushings of the upper arm for wear or damage.
  • Page 289 '61HN252' by American Honda Motor Co. - Page 289 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING BALL JOINT REPLACEMENT UPPER ARM Remove the snap ring from the ball joint. SNAP RING Set the upper arm and special tools with "A" mark...
  • Page 290 '61HN252' by American Honda Motor Co. - Page 290 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING KNUCKLE Remove the snap ring and the inner dust seal. INNER DUST SEAL SNAP RING Set the knuckle and special tools with "A" mark side...
  • Page 291 '61HN252' by American Honda Motor Co. - Page 291 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING KNUCKLE BEARING REPLACEMENT Remove the dust seals from the knuckle. DUST SEALS Remove the snap ring and drive the bearing out of SNAP RING the knuckle.
  • Page 292 '61HN252' by American Honda Motor Co. - Page 292 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Apply grease to a new inner dust seal lip and install OIL SEAL DRIVER DRIVER it until it is fully seated, being careful not to damage the lips.
  • Page 293: Steering Shaft

    '61HN252' by American Honda Motor Co. - Page 293 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Tighten the ball joint castle nuts to the specified CASTLE NUTS torque and further tighten until their grooves align with the cotter pin holes.
  • Page 294 '61HN252' by American Honda Motor Co. - Page 294 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING nuts HANDLEBAR FRONT COVER handlebar front cover NUTS handlebar lower holder nuts and washers HANDLEBAR Keep the master handlebar assembly from the steering shaft cylinder reservoir upright.
  • Page 295 '61HN252' by American Honda Motor Co. - Page 295 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Remove the two bolts and steering shaft holder A. BOLTS STEERING SHAFT HOLDER A Remove the steering shaft. BUSHING SHAFT Remove the steering shaft bushing, holder B and shaft.
  • Page 296 '61HN252' by American Honda Motor Co. - Page 296 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Turn the inner race of the steering shaft bearing with your finger. The bearing should turn smoothly and quietly. Also check that the bearing outer race fits tightly in the frame.
  • Page 297 '61HN252' by American Honda Motor Co. - Page 297 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the snap ring into the groove properly with SNAP RING the chamfered edge facing up. Coat new dust seal lips with grease and install them...
  • Page 298 '61HN252' by American Honda Motor Co. - Page 298 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Apply grease to the end nut threads and seating NUT/WASHER COTTER PIN surface. Apply molybdenum disulfide grease to the steering shaft spline. Install the shaft arm over the steering shaft by align- ing the wide tooth with the wide groove.
  • Page 299 '61HN252' by American Honda Motor Co. - Page 299 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Install the handlebar upper cover and tighten the HANDLEBAR UPPER COVER screw. Install the front fender (page 2-11). Install the inner fenders (page 2-9).
  • Page 300 '61HN252' by American Honda Motor Co. - Page 300 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING BALL JOINT DISASSEMBLY/ ASSEMBLY Loosen the lock nuts and remove the ball joints and LOCK NUT lock nuts from the tie-rod. FLAT Install the unmarked ball joint and gold colored nut "L"...
  • Page 301: Front Shock Absorber

    '61HN252' by American Honda Motor Co. - Page 301 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING FRONT SHOCK ABSORBER REMOVAL Support the vehicle with a support block to raise the UPPER MOUNTING front wheels off the ground. BOLT/NUT Support the suspension arm or front wheel, and remove the upper and lower mounting nuts, bolts and shock absorber.
  • Page 302 '61HN252' by American Honda Motor Co. - Page 302 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Apply grease to the needle rollers of a new bearing. Press in the bearing 5.4--5.5 mm (0.21--0.22 in) Carefully press the needle bearing in the lower pivot...
  • Page 303 '61HN252' by American Honda Motor Co. - Page 303 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT WHEEL/SUSPENSION/STEERING Apply grease to new dust seal lips and install the DUST SEALS dust seals into the lower pivot until they are flush with the pivot surfaces.
  • Page 304 '61HN252' by American Honda Motor Co. - Page 304 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:07 PM...
  • Page 305: Rear Wheel/Suspension

    '61HN252' by American Honda Motor Co. - Page 305 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION SYSTEM COMPONENTS ························· 15-2 REAR WHEEL············································ 15-6 SERVICE INFORMATION ························· 15-3 REAR SHOCK ABSORBER ······················· 15-6 TROUBLESHOOTING ······························· 15-5 SWINGARM ·············································· 15-9 15-1...
  • Page 306 '61HN252' by American Honda Motor Co. - Page 306 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION REARWHEEL/SUSPENSION SYSTEM COMPONENTS 34 N·m (3.5 kgf·m, 25 lbf·ft) 64 N·m (6.5 kgf·m, 47 lbf·ft) 44 N·m (4.5 kgf·m, 32 lbf·ft) 112 N·m (11.4 kgf·m, 83 lbf·ft) '05'06: 10 N·m (1.0 kgf·m, 7 lbf·ft)
  • Page 307: Brake System

    A jack or other support is required to support the vehicle. · Use genuine Honda replacement bolts and nuts for all suspension pivots and mounting points. · When using the lock nut wrench, use a deflecting beam type torque wrench 20 inches long. The lock nut wrench increases the torque wrench's leverage, so the torque wrench reading will be less than the torque actually applied to the lock nut.
  • Page 308 '61HN252' by American Honda Motor Co. - Page 308 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION TOOLS Driver Attachment, 37 x 40 mm Attachment, 22 x 24 mm 07749-0010000 07746-0010200 07746-0010800 Pilot, 16 mm Lock nut wrench Adjustable bearing remover, 20 x 40 mm...
  • Page 309: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 309 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION TROUBLESHOOTING Rear wheel wobbling · Bent rim · Faulty tire · Wheel hub nut not tightened properly · Faulty bearings Steers to one side or does not track straight ·...
  • Page 310: Rear Wheel

    '61HN252' by American Honda Motor Co. - Page 310 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION REAR WHEEL REMOVAL Loosen the wheel nuts. Support the vehicle with a support block to raise the rear wheels off the ground. Remove the nuts and wheel.
  • Page 311 '61HN252' by American Honda Motor Co. - Page 311 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION INSPECTION Check the upper pivot bushing for wear or damage. UPPER PIVOT BUSHING Check the damper unit for leakage or other damage. Replace the shock absorber assembly if necessary.
  • Page 312 '61HN252' by American Honda Motor Co. - Page 312 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION Apply grease to the needle rollers of a new bearing. 5.4--5.5 mm (0.21--0.22 in) Carefully press the needle bearing in the lower pivot until the depth from the lower pivot outer surface is 5.4-5.5 mm (0.21-0.22 in), using the special tools.
  • Page 313 '61HN252' by American Honda Motor Co. - Page 313 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION Apply grease to new dust seal lips and install the DUST SEALS dust seals into the lower pivot until they are flush with the pivot surfaces.
  • Page 314 '61HN252' by American Honda Motor Co. - Page 314 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION Remove the bolt, brake light switch guard and brake light switch. Remove the left and right swingarm pivot caps. LEFT PIVOT CAP RIGHT PIVOT CAP Remove the right pivot lock nut using the special tool.
  • Page 315 '61HN252' by American Honda Motor Co. - Page 315 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION Remove the universal joint. BOOT Check the joint boot for tears or other damage and replace it if necessary. UNIVERSAL JOINT INSPECTION Remove the pivot bearings from the swingarm piv- OUTER RACES ots.
  • Page 316 '61HN252' by American Honda Motor Co. - Page 316 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION Install a new grease holder into the swingarm pivot. OUTER RACE Drive a new outer race into the swingarm pivot until it is fully seated, using the special tools.
  • Page 317 '61HN252' by American Honda Motor Co. - Page 317 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR WHEEL/SUSPENSION Tighten the right pivot lock nut using the special tool, while holding the pivot bolt. TOOL: Lock nut wrench 07908-4690003 Refer to torque LOCK NUT TORQUE: Actual: 112 N·m (11.4 kgf·m, 82 lbf·ft)
  • Page 318 '61HN252' by American Honda Motor Co. - Page 318 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:09 PM...
  • Page 319: Brake System

    '61HN252' by American Honda Motor Co. - Page 319 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM COMPONENT LOCATION ························ 16-2 FRONT MASTER CYLINDER ···················· 16-8 SERVICE INFORMATION ························· 16-3 BRAKE PAD/DISC ·································· 16-13 TROUBLESHOOTING ······························· 16-5 FRONT BRAKE CALIPER ························ 16-14 BRAKE FLUID REPLACEMENT/AIR REAR BRAKE ··········································...
  • Page 320 '61HN252' by American Honda Motor Co. - Page 320 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM BRAKESYSTEM COMPONENT LOCATION 44 N·m (4.5 kgf·m, 33 lbf·ft) 20 N·m (2.0 kgf·m, 14 lbf·ft) 137 N·m (14.0 kgf·m, 101 lbf·ft) 11 N·m (1.1 kgf·m, 8 lbf·ft) 34 N·m (3.5 kgf·m, 25 lbf·ft)
  • Page 321 '61HN252' by American Honda Motor Co. - Page 321 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM SERVICE INFORMATION GENERAL Frequent inhalation of brake lining or pad dust, regardless of material composition could be hazardous to your health. · Avoid breathing dust particles.
  • Page 322 '61HN252' by American Honda Motor Co. - Page 322 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM TOOLS Snap ring pliers Driver Attachment, 78 x 80 mm 07914-SA50001 07749-0010000 07NAD-PX40100 Pilot, 28 mm Oil seal driver attachment 07746-0041100 07JAD-PH80101 16-4...
  • Page 323: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 323 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM TROUBLESHOOTING Poor brake performance · Air in hydraulic system · Leaking hydraulic system · Contaminated brake pad/disk · Worn caliper piston seal · Worn master cylinder piston cups ·...
  • Page 324: Brake Fluid Replacement/Air Bleeding

    '61HN252' by American Honda Motor Co. - Page 324 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM BRAKE FLUID REPLACEMENT/AIR BLEEDING · Do not allow foreign material to enter the system when filling the reservoir. · Use only Honda DOT 4 brake fluid from a sealed container.
  • Page 325: Instructions

    '61HN252' by American Honda Motor Co. - Page 325 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Connect a commercially available brake bleeder to BRAKE BLEEDER the bleed valve. Pump the brake bleeder and loosen the bleed valve, adding fluid when the fluid level in the master cylin- der reservoir is low.
  • Page 326: Front Master Cylinder

    '61HN252' by American Honda Motor Co. - Page 326 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Fill the fluid reservoir with DOT 4 brake fluid to the UPPER LEVEL upper level. Reinstall the diaphragm, diaphragm plate and reser- SCREWS voir cover, and tighten the screws.
  • Page 327 '61HN252' by American Honda Motor Co. - Page 327 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM DISASSEMBLY Remove the brake lever boot. PIVOT BOLT BOOT Remove the front brake lever nut, pivot bolt and brake lever. BRAKE LEVER PIVOT NUT...
  • Page 328 '61HN252' by American Honda Motor Co. - Page 328 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Remove the master piston, primary cup, spring and OIL SEAL oil seal. SPRING PISTON PRIMARY CUP SECONDARY CUP INSPECTION Check the piston boot, primary cup and secondary cup for fatigue or damage.
  • Page 329 '61HN252' by American Honda Motor Co. - Page 329 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Fill the master piston boot with silicone grease. Install the boot. BOOT Install the brake light switch by aligning the hole of BRAKE LIGHT SWITCH the master cylinder and boss of the brake light switch.
  • Page 330 '61HN252' by American Honda Motor Co. - Page 330 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Apply silicone grease to the brake lever contact area of the master cylinder piston. Apply silicone grease to the brake lever contact area...
  • Page 331: Brake Pad/Disc

    '61HN252' by American Honda Motor Co. - Page 331 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Install the brake hose between the stoppers with the SEALING WASHERS new sealing washers. Install and tighten the brake hose oil bolt to the specified torque.
  • Page 332: Front Brake Caliper

    '61HN252' by American Honda Motor Co. - Page 332 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Put back the caliper. CALIPER Install and tighten the brake caliper bolt to the spec- ified torque. TORQUE: 23 N·m (2.3 kgf·m, 17 lbf·ft) Install the front wheel (page 14-12).
  • Page 333 '61HN252' by American Honda Motor Co. - Page 333 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Remove the oil bolt, sealing washers and brake BRAKE HOSE hose from the brake caliper. OIL BOLT SEALING WASHERS Remove the mounting bolts and brake caliper.
  • Page 334 '61HN252' by American Honda Motor Co. - Page 334 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM If necessary, lightly apply compressed air to the cal- PISTON/DUST SEAL iper fluid inlet to get the piston and dust seal out. Place a shop rag under the caliper to cushion the piston when it is expelled.
  • Page 335 '61HN252' by American Honda Motor Co. - Page 335 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM ASSEMBLY CALIPER BRACKET CALIPER PIN BOOT BRAKE PADS PAD SPRINGS CALIPER CALIPER PIN PISTON CALIPER BODY PISTON SEAL BRACKET PIN DUST SEAL BRACKET PIN BOOT...
  • Page 336 '61HN252' by American Honda Motor Co. - Page 336 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Install and tighten the brake caliper bolts to the CALIPER BOLTS specified torque. TORQUE: 23 N·m (2.3 kgf·m, 17 lbf·ft) INSTALLATION Install the brake caliper and new mounting bolts.
  • Page 337: Rear Brake

    '61HN252' by American Honda Motor Co. - Page 337 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM REAR BRAKE BRAKE DRUM REMOVAL Remove the rear wheel (page 15-6). COTTER PIN Remove the cotter pin. Remove the right rear hub nut and wheel hub.
  • Page 338 '61HN252' by American Honda Motor Co. - Page 338 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Check the wheel hub dust seal for wear or damage. DUST SEAL Check the brake drum cover dust seal for wear or DUST SEAL damage.
  • Page 339 '61HN252' by American Honda Motor Co. - Page 339 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM BRAKE PANEL DISASSEMBLY Mark the brake Remove the cotter pins, setting plate, brake shoes SPRINGS COTTER PINS and shoe springs. shoes to indicate...
  • Page 340 '61HN252' by American Honda Motor Co. - Page 340 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Remove the brake cam. BRAKE CAM Disconnect the breather hose from the brake panel. BREATHER HOSE BRAKE PANEL Remove the brake panel nuts and discard them.
  • Page 341 '61HN252' by American Honda Motor Co. - Page 341 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Remove the snap ring. SNAP RING Drive the bearing out of the brake panel. BEARING Drive a new bearing into the brake panel with its...
  • Page 342 '61HN252' by American Honda Motor Co. - Page 342 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM BRAKE PANEL ASSEMBLY 20 N·m (2.0 kgf·m, 14 lbf·ft) BRAKE ARM INDICATOR PLATE DRUM COVER WHEEL HUB FELT SEAL 137 N·m (14.0 kgf·m, 101 lbf·ft)
  • Page 343 '61HN252' by American Honda Motor Co. - Page 343 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Apply grease to the brake cam sliding surface and anchor pins. Install the brake cam into the brake panel. BRAKE CAM Apply engine oil to the felt seal and install it.
  • Page 344 '61HN252' by American Honda Motor Co. - Page 344 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Install the new cotter pins and secure the setting COTTER PINS plate as shown. SETTING PLATE Install the joint pins into the brake arm, then install SPRINGS the brake cables and springs.
  • Page 345: Brake Pedal

    '61HN252' by American Honda Motor Co. - Page 345 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Apply molybdenum disulfide grease to the wheel WHEEL HUB hub dust seal and axle splines. Install wheel hub onto the rear axle. Install the hub nut and tighten it to the specified COTTER PIN torque.
  • Page 346 '61HN252' by American Honda Motor Co. - Page 346 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Disconnect the brake cable. RETURN SPRING Unhook the brake pedal return spring. BRAKE CABLE Remove the cotter pin and washer from the pedal...
  • Page 347 '61HN252' by American Honda Motor Co. - Page 347 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BRAKE SYSTEM Install and connect the brake cable. RETURN SPRING Hook the return spring. BRAKE CABLE Install the brake light switch. BRAKE LIGHT SWITCH SPRING Hook the brake light switch spring.
  • Page 348 '61HN252' by American Honda Motor Co. - Page 348 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:12 PM...
  • Page 349: Front Driving Mechanism

    '61HN252' by American Honda Motor Co. - Page 349 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM SYSTEM COMPONENTS ························· 17-2 DIFFERENTIAL DISASSEMBLY/ INSPECTION ··········································· 17-17 SERVICE INFORMATION ························· 17-3 CASE BEARING REPLACEMENT ·········· 17-24 TROUBLESHOOTING ······························· 17-6 DIFFERENTIAL ASSEMBLY ··················· 17-27 FRONT DRIVE SHAFT ······························...
  • Page 350: System Components

    '61HN252' by American Honda Motor Co. - Page 350 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM FRONTDRIVINGMECHANISM SYSTEM COMPONENTS 44 N·m (4.5 kgf·m, 33 lbf·ft) 44 N·m (4.5 kgf·m, 33 lbf·ft) 54 N·m (5.5 kgf·m, 40 lbf·ft) 7 N·m (0.7 kgf·m, 5.1 lbf·ft)
  • Page 351: Service Information

    '61HN252' by American Honda Motor Co. - Page 351 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM SERVICE INFORMATION GENERAL · Perform the gear contact pattern and backlash inspection whenever you replace the bearings, gears or gear case. The extension lines from the gear engagement surfaces should intersect at one point.
  • Page 352 '61HN252' by American Honda Motor Co. - Page 352 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM TOOLS Driver Attachment, 22 x 24 mm Attachment, 52 x 55 mm 07749-0010000 07746-0010800 07746-0010400 Attachment, 20 mm I.D. Pilot, 15 mm...
  • Page 353 '61HN252' by American Honda Motor Co. - Page 353 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Differential inspection tool Driver, 40 mm I.D. Attachment, 30 mm I.D. 07KMK-HC50101 07746-0030100 07746-0030300 or 07KMK-HC5010A (U.S.A. only) Differential bearing clip compressor...
  • Page 354: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 354 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM TROUBLESHOOTING Consistent noise during cruising · Oil level too low · Foreign matter contaminating gear oil · Worn or damaged bearing · Worn or damaged ring gear and pinion gear ·...
  • Page 355: Front Drive Shaft

    '61HN252' by American Honda Motor Co. - Page 355 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM FRONT DRIVE SHAFT REMOVAL Remove the front wheel (page 14-12). AXLE NUT Remove the cotter pin and loosen the axle nut. COTTER PIN Remove the cotter pin.
  • Page 356 '61HN252' by American Honda Motor Co. - Page 356 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Separate the ball joints, using the special tool according to the instructions (page 14-18). TOOL: Ball joint remover, 28 mm 07MAC-SL00200 BALL JOINT REMOVER Remove the axle nut and the wheel hub/knuckle.
  • Page 357 '61HN252' by American Honda Motor Co. - Page 357 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Bend up the lock tabs and raise the band ends to Replace the bands BAND END with new ones loosen the boot bands on the inboard side.
  • Page 358 '61HN252' by American Honda Motor Co. - Page 358 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Bend up the lock tabs and raise the band ends to BAND A loosen the boot bands on the outboard side. Remove boot band A.
  • Page 359 '61HN252' by American Honda Motor Co. - Page 359 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Note the installation direction of the boot bands. Forward rotation direction BAND Pack the outboard joint with 40 60 g of molybde-...
  • Page 360 '61HN252' by American Honda Motor Co. - Page 360 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Adjust the length of the drive shaft to the figure given below. DRIVE SHAFT LENGTH: Left: 363.2 mm (14.30 in) Right: 383 mm (15.08 in)
  • Page 361 '61HN252' by American Honda Motor Co. - Page 361 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Install the drive shaft by holding the inboard joint Be careful not to INBOARD JOINT damage the oil seal until the stopper ring seats in the groove of the dif- ferential.
  • Page 362: Differential Removal

    '61HN252' by American Honda Motor Co. - Page 362 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Install the tie-rod onto the knuckle. TIE-ROD Install a new tie-rod ball joint nut and tighten it by holding the ball joint stud flats with an open end wrench.
  • Page 363 '61HN252' by American Honda Motor Co. - Page 363 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Remove the rear vehicle speed sensor wire and CLUTCH 2P(GREEN) CONNECTOR front final clutch wire from the clamp. COVER STAY Remove the three bolts, front clutch cover stay and rear vehicle speed sensor.
  • Page 364 '61HN252' by American Honda Motor Co. - Page 364 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Remove the differential case lower mounting bolt. BOLT Move the differential forward for maximum clear- PROPELLER SHAFT JOINT O-RING ance between the propeller shaft joint and engine.
  • Page 365: Inspection

    '61HN252' by American Honda Motor Co. - Page 365 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Separate the other drive shaft from the differential. DRIVE SHAFT Remove the differential assembly from the frame. DIFFERENTIAL DIFFERENTIAL DISASSEMBLY/ INSPECTION PROPELLER SHAFT INSPECTION...
  • Page 366 '61HN252' by American Honda Motor Co. - Page 366 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Turn the 8 mm nut and check the pinion gear turns smoothly and quietly without binding. If the pinion gear does not turn smoothly or quietly, the pinion gear, ring gear or bearing may be dam- aged or faulty.
  • Page 367 '61HN252' by American Honda Motor Co. - Page 367 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM mm (0.004 in) thicker shim, replace the right shim with one that is 0.10 mm (0.004 in) thinner. DIFFERENTIAL CASE DISASSEMBLY Loosen the two 10 mm cover bolts and four 8 mm...
  • Page 368 '61HN252' by American Honda Motor Co. - Page 368 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM GEAR TOOTH CONTACT PATTERN CHECK Clean sealing material off the mating surfaces of the Keep dust and dirt LEFT SHIM out of the case and differential case and cover, being careful not to damage them.
  • Page 369 '61HN252' by American Honda Motor Co. - Page 369 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Replace the pinion shim with a thicker one if the TOO HIGH: contact pattern is too high, toward the face. PINION SHIM...
  • Page 370 '61HN252' by American Honda Motor Co. - Page 370 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Remove the following: SIDE CONE SPRING ring gear side cone spring shim RING GEAR SHIM left face cam LEFT FACE six cam followers A and six cam followers B...
  • Page 371 '61HN252' by American Honda Motor Co. - Page 371 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM DIFFERENTIAL HOUSING/FACE CAM/CAM FOLLOWERS Check the sliding surface and grooves of the hous- DIFFERENTIAL HOUSING ing for damage or discoloration. Check the shim, face cams and followers for dam-...
  • Page 372: Case Bearing Replacement

    '61HN252' by American Honda Motor Co. - Page 372 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM PINION GEAR REMOVAL Remove the three bolts and front final clutch assem- BOLTS bly from the differential. Remove the O-ring from the final clutch assembly.
  • Page 373 '61HN252' by American Honda Motor Co. - Page 373 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Drive new bearings into the differential case and DRIVER cover. TOOLS: Driver 07749-0010000 Attachment, 52 x 55 mm 07746-0010400 Pilot, 28 mm...
  • Page 374 '61HN252' by American Honda Motor Co. - Page 374 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Install the bearing into the compressor until it is flush with the end of the tool. TOOL: Bearing compressor clip 07YME-HN4010A Place the driver, attachment and pilot on the top of the bearing and tape the driver to the compressor.
  • Page 375: Differential Assembly

    '61HN252' by American Honda Motor Co. - Page 375 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM DIFFERENTIAL ASSEMBLY 25 N·m (2.5 kgf·m, EACH BEARING 18 lbf·ft) EACH STOPPER RING EACH O-RING PINION BEARING PINION SHIM CONE SPRING PINION GEAR...
  • Page 376 '61HN252' by American Honda Motor Co. - Page 376 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM PINION GEAR INSTALLATION When the gear set, Install the shim and new bearing onto the pinion PINION BEARING gear. differential bearing, differential housing...
  • Page 377 '61HN252' by American Honda Motor Co. - Page 377 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Install the final clutch assembly onto the differential. BOLTS Install and tighten the new three bolts. TORQUE: 25 N·m (2.5 kgf·m, 18 lbf·ft)
  • Page 378 '61HN252' by American Honda Motor Co. - Page 378 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Apply locking agent to the threads of the new ring BOLTS gear bolts. Install the new ring gear bolts and tighten them in a crisscross pattern in several steps.
  • Page 379 '61HN252' by American Honda Motor Co. - Page 379 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Apply locking agent to the threads of the two 10 mm It is important to 8 mm BOLTS PRYING POINT turn the pinion gear bolts.
  • Page 380: Differential Installation

    '61HN252' by American Honda Motor Co. - Page 380 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM DIFFERENTIAL INSTALLATION Place the differential into the frame. DRIVE SHAFT Install the right drive shaft onto the differential in the same manner as on (page 17-12).
  • Page 381 '61HN252' by American Honda Motor Co. - Page 381 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Align the bolt holes in the differential and frame, and install the lower mounting 10 mm mounting bolt. BOLT Install the distance collar, 10 mm upper mounting BOLT bolt and nut.
  • Page 382 '61HN252' by American Honda Motor Co. - Page 382 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] FRONT DRIVING MECHANISM Connect the front final clutch 2P (Green) connector 2P(GREEN) CONNECTOR and install it onto the clutch cover stay. Install the rear speed sensor, clutch cover stay and...
  • Page 383: Rear Driving Mechanism

    '61HN252' by American Honda Motor Co. - Page 383 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM SYSTEM COMPONENTS ························· 18-2 FINAL DRIVE DISASSEMBLY/ INSPECTION ··········································· 18-10 SERVICE INFORMATION ························· 18-3 FINAL GEAR CASE BEARING REPLACEMENT ······································ 18-16 TROUBLESHOOTING ······························· 18-6 FINAL DRIVE ASSEMBLY ······················...
  • Page 384 '61HN252' by American Honda Motor Co. - Page 384 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM REARDRIVINGMECHANISM SYSTEM COMPONENTS 137 N·m (14.0 kgf·m, 101 lbf·ft) 54 N·m (5.5 kgf·m, 40 lbf·ft) 44 N·m (4.5 kgf·m, 33 lbf·ft) 44 N·m (4.5 kgf·m, 33 lbf·ft) 32 N·m (3.3 kgf·m, 24 lbf·ft)
  • Page 385 '61HN252' by American Honda Motor Co. - Page 385 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM SERVICE INFORMATION GENERAL · Perform the gear contact pattern and backlash inspection whenever you replace the bearings, gears or gear case. The extension lines from the gear engagement surfaces should intersect at one point.
  • Page 386 '61HN252' by American Honda Motor Co. - Page 386 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM TOOLS Driver Attachment, 52 x 55 mm Attachment, 62 x 68 mm 07749-0010000 07746-0010400 07746-0010500 Attachment, 22 x 24 mm Pilot, 32 mm...
  • Page 387 '61HN252' by American Honda Motor Co. - Page 387 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Puller shaft Driver, 40 mm I.D. Attachment, 30 mm I.D. 07931-ME40000 07746-0030100 07746-0030300 or 07931-ME4010B and Special nut 07931-HB3020A (U.S.A. only) Bearing remover head, 14 mm...
  • Page 388: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 388 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM TROUBLESHOOTING Excessive noise · Worn or damaged bearing · Worn or scored splines · Worn or damaged drive shaft, propeller shaft or universal joint ·...
  • Page 389: Rear Axle Removal

    '61HN252' by American Honda Motor Co. - Page 389 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM REAR AXLE REMOVAL Remove the following: BRAKE PANEL SPRINGS rear wheels (page 15-6) rear brake drum (page 16-19) breather hose JOINT PINS...
  • Page 390 '61HN252' by American Honda Motor Co. - Page 390 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Remove the rear axle by driving the axle from the REAR AXLE left side using a rubber mallet. INSPECTION REAR AXLE Set the axle in V-blocks and measure the axle runout with a dial indicator.
  • Page 391: Final Drive Removal

    '61HN252' by American Honda Motor Co. - Page 391 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Apply grease to a new dust seal lips. DRIVER Install the dust seal with the metal plate side facing up until it is flush with the housing end.
  • Page 392 '61HN252' by American Honda Motor Co. - Page 392 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM INSPECTION Check the seal rubber for wear or damage. Check the splines of the drive shaft for wear or dam- SPLINES age.
  • Page 393 '61HN252' by American Honda Motor Co. - Page 393 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Set a horizontal type dial indicator on the ring gear DIAL INDICATOR through the oil filler hole. Turn the ring gear back and forth with the axle to read backlash.
  • Page 394 '61HN252' by American Honda Motor Co. - Page 394 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Remove the ring gear and shims. RING GEAR SHIMS BEARING INSPECTION Turn the inner race of each bearing in the gear case and case cover with your finger.
  • Page 395 '61HN252' by American Honda Motor Co. - Page 395 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Install the case cover and tighten the bolts in several It is important to turn the pinion steps until the cover evenly touches the gear case.
  • Page 396 '61HN252' by American Honda Motor Co. - Page 396 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM PINION GEAR REMOVAL Remove the pinion joint from the pinion gear by PINION JOINT pulling it to force the stopper ring at the pinion gear shaft end past the groove in the pinion joint.
  • Page 397 '61HN252' by American Honda Motor Co. - Page 397 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Install the special tools onto the pinion gear shaft PULLER SHAFT and gear case. TOOLS: Pinion puller base 07HMC-MM80110 or 07HMC-MM8011A (U.S.A. only)
  • Page 398: Final Gear Case Bearing Replacement

    '61HN252' by American Honda Motor Co. - Page 398 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM FINAL GEAR CASE BEARING REPLACEMENT RING GEAR BEARING Remove the oil seals from the case and cover. OIL SEAL BEARING Drive the bearings out of the case and cover.
  • Page 399 '61HN252' by American Honda Motor Co. - Page 399 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM PINION NEEDLE BEARING Remove the stopper ring by rotating it until the end BEARING of the stopper ring appears in the access hole.
  • Page 400: Final Drive Assembly

    '61HN252' by American Honda Motor Co. - Page 400 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM FINAL DRIVE ASSEMBLY GEAR CASE O-RING OIL FILLER CAP RING GEAR BEARING OIL SEAL RING GEAR STOPPER RING SHIM PINION NEEDLE BEARING...
  • Page 401 '61HN252' by American Honda Motor Co. - Page 401 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM PINION GEAR INSTALLATION Drive the pinion gear assembly into the gear case OIL SEAL DRIVER using the special tool. TOOL: Oil seal driver 07965-KE80200 ·...
  • Page 402 '61HN252' by American Honda Motor Co. - Page 402 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Install the pinion joint onto the pinion gear shaft by Be careful not to PINION JOINT damage the oil seal pushing it in until the stopper ring seats in the groove in the joint.
  • Page 403: Final Drive Installation

    '61HN252' by American Honda Motor Co. - Page 403 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Install the proper ring gear shims onto the ring gear GEAR CASE RING GEAR and install them into the gear case. SHIM...
  • Page 404 '61HN252' by American Honda Motor Co. - Page 404 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Clean the mating surfaces of the gear case. O-RING Coat a new O-ring with grease and install it into the groove in the gear case.
  • Page 405: Rear Axle Installation

    '61HN252' by American Honda Motor Co. - Page 405 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM REAR AXLE INSTALLATION Apply molybdenum disulfide grease to the center REAR AXLE splines of the axle. Install the axle into the final drive gear case from right side until it is fully seated.
  • Page 406 '61HN252' by American Honda Motor Co. - Page 406 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] REAR DRIVING MECHANISM Apply molybdenum disulfide grease to a new hub dust seal lip and install it into the left wheel hub DUST SEAL until it is fully seated.
  • Page 407: Battery/Charging System

    '61HN252' by American Honda Motor Co. - Page 407 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM COMPONENT LOCATION ························ 19-2 BATTERY ·················································· 19-5 SYSTEM DIAGRAM ·································· 19-2 CHARGING SYSTEM INSPECTION········· 19-8 SERVICE INFORMATION ························· 19-3 ALTERNATOR CHARGING COIL ············· 19-9 TROUBLESHOOTING ·······························...
  • Page 408 '61HN252' by American Honda Motor Co. - Page 408 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM BATTERY/CHARGINGSYSTEM COMPONENT LOCATION BATTERY FUSE (30 A) ALTERNATOR REGULATOR/ RECTIFIER SYSTEM DIAGRAM G: Green R: Red Y: Yellow 19-2 1 of 1 3/9/2008 11:19 PM...
  • Page 409 '61HN252' by American Honda Motor Co. - Page 409 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM SERVICE INFORMATION GENERAL · The battery gives off explosive gases; keep sparks, flames and cigarettes away. Provide adequate ventilation when charging. · The battery contains sulfuric acid (electrolyte). Contact with skin or eyes may cause severe burns. Wear protective clothing and a face shield.
  • Page 410: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 410 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM TROUBLESHOOTING BATTERY IS DAMAGED OR WEAK 1. Battery Test Remove the battery (page 19-5). Check the battery condition using the recommended battery tester.
  • Page 411 '61HN252' by American Honda Motor Co. - Page 411 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM BATTERY REMOVAL/INSTALLATION Remove the seat (page 2-4). TERMINAL COVER Remove the battery holder band. HOLDER BAND With the ignition switch OFF, disconnect the nega-...
  • Page 412 '61HN252' by American Honda Motor Co. - Page 412 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM Set the temperature switch to "HIGH" or "LOW" depending on the ambient temperature. HIGH: 15°C (60°F) or higher LOW: 15°C (60°F) or lower...
  • Page 413 '61HN252' by American Honda Motor Co. - Page 413 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM BATTERY CHARGING (U.S.A. only) Remove the battery (page 19-5). · Make sure the area around the charger is well ventilated, clear of flammable materials, and free from heat, humidity, water and dust.
  • Page 414: Charging System Inspection

    '61HN252' by American Honda Motor Co. - Page 414 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM CHARGING SYSTEM INSPECTION CURRENT LEAKAGE INSPECTION Remove the seat (page 2-4). NEGATIVE () TERMINAL Turn the ignition switch to OFF and disconnect the (+) PROBE negative () cable from the battery.
  • Page 415: Alternator Charging Coil

    '61HN252' by American Honda Motor Co. - Page 415 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM ALTERNATOR CHARGING COIL INSPECTION Remove the recoil starter cover (page 2-4). 5P (NATURAL) CONNECTOR Disconnect the alternator 5P (Natural) connector. Check the connector for loose contacts or corroded terminals.
  • Page 416 '61HN252' by American Honda Motor Co. - Page 416 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] BATTERY/CHARGING SYSTEM BATTERY LINE Measure the voltage between the Red wire terminal 3P (GRAY) CONNECTOR of 3P (Black) connector and ground. There should be battery voltage at all times.
  • Page 417: Ignition System

    '61HN252' by American Honda Motor Co. - Page 417 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM COMPONENT LOCATION ························ 20-2 IGNITION SYSTEM INSPECTION············ 20-5 SYSTEM DIAGRAM ·································· 20-2 IGNITION COIL ········································· 20-7 SERVICE INFORMATION ························· 20-3 IGNITION TIMING ···································· 20-7 TROUBLESHOOTING ·······························...
  • Page 418 '61HN252' by American Honda Motor Co. - Page 418 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM IGNITIONSYSTEM COMPONENT LOCATION IGNITION SWITCH ENGINE CONTROL ENGINE STOP SWITCH MODULE (ECM) IGNITION COIL BATTERY FUSE (10 A) SPARK PLUG IGNITION PULSE GENERATOR...
  • Page 419: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 419 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM SERVICE INFORMATION GENERAL · Some electrical components may be damaged if terminals or connectors are connected or disconnected while the igni- tion switch is ON and current is present.
  • Page 420: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 420 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM TROUBLESHOOTING · Inspect the following before diagnosing the system: Faulty spark plug Loose spark plug cap or spark plug wire connection Water got into the spark plug cap (leaking the ignition coil secondary voltage) ·...
  • Page 421: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 421 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM IGNITION SYSTEM INSPECTION · If there is no spark at the plug, check all connec- tions for loose or poor contact before measuring the peak voltage.
  • Page 422 '61HN252' by American Honda Motor Co. - Page 422 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM IGNITION PULSE GENERATOR PEAK VOLTAGE · Check that the cylinder compression is normal and the spark plug is installed correctly in the cyl- inder head.
  • Page 423: Ignition Coil

    '61HN252' by American Honda Motor Co. - Page 423 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM IGNITION COIL REMOVAL/INSTALLATION Remove the fuel tank (page 2-6). SPARK PLUG CAP Disconnect the plug cap from the plug. Release the spark plug wire from the wire clamp.
  • Page 424 '61HN252' by American Honda Motor Co. - Page 424 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] IGNITION SYSTEM The ignition timing is correct if the "F" mark on the INDEX MARK flywheel aligns with the index mark on the rear crankcase cover at idle.
  • Page 425: Electric Starter

    '61HN252' by American Honda Motor Co. - Page 425 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER COMPONENT LOCATION ························ 21-2 STARTER MOTOR ···································· 21-7 SYSTEM DIAGRAM ·································· 21-3 STARTER RELAY SWITCH····················· 21-13 SERVICE INFORMATION ························· 21-4 DIODE······················································ 21-14 TROUBLESHOOTING ······························· 21-5...
  • Page 426 '61HN252' by American Honda Motor Co. - Page 426 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER ELECTRICSTARTER COMPONENT LOCATION STARTER SWITCH IGNITION SWITCH FRONT STOP SWITCH ENGINE STOP SWITCH GEAR POSITION SWITCH BATTERY FUSE (30 A) STARTER RELAY SWITCH...
  • Page 427: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 427 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER SERVICE INFORMATION GENERAL · Always turn the ignition switch to OFF before servicing the starter motor. The motor could suddenly start, causing seri- ous injury.
  • Page 428: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 428 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER TROUBLESHOOTING · The starter motor should operate when the transmission is in neutral or when the transmission is in drive and the front brake lever is squeezed.
  • Page 429 '61HN252' by American Honda Motor Co. - Page 429 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER 7. Starter Relay Switch Inspection Check the function of the starter relay switch (page 21-12). Is the starter relay switch function properly? Faulty starter relay switch.
  • Page 430: Starter Motor

    '61HN252' by American Honda Motor Co. - Page 430 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER STARTER MOTOR REMOVAL Remove the following: RIGHT ENGINE SIDE COVER seat (page 2-4) recoil starter cover (page 2-4) With the ignition switch OFF, remove the negative () cable from the battery.
  • Page 431 '61HN252' by American Honda Motor Co. - Page 431 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER rear cover shims REAR COVER SEAL RING SHIMS seal ring armature ARMATURE Check the bushing in the rear cover for wear or damage.
  • Page 432 '61HN252' by American Honda Motor Co. - Page 432 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER Check for continuity between pairs of commutator Continuity bars. There should be continuity. Check for continuity between each commutator bar No continuity and the armature shaft.
  • Page 433 '61HN252' by American Honda Motor Co. - Page 433 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER Remove the following: O-RING INSULATOR WASHERS washer insulator washers brush holder assembly O-ring insulator BRUSH HOLDER WASHER Remove the brushes from the brush holder.
  • Page 434 '61HN252' by American Honda Motor Co. - Page 434 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER Install the brushes into the brush holder. BRUSHES Install the insulator onto the terminal bolt. TERMINAL BOLT BRUSH HOLDER Install the brush holder assembly into the rear cover...
  • Page 435 '61HN252' by American Honda Motor Co. - Page 435 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER Align the index lines on the front cover and motor case. O-RINGS Install the set plates and new O-rings onto the motor case bolts.
  • Page 436: Starter Relay Switch

    '61HN252' by American Honda Motor Co. - Page 436 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER STARTER RELAY SWITCH REMOVAL/INSTALLATION Remove the seat (page 2-4). Slide the rubber caps off the starter relay switch ter- minals. Remove the nuts, battery positive (+) cable and starter motor cable from the starter relay switch.
  • Page 437 '61HN252' by American Honda Motor Co. - Page 437 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] ELECTRIC STARTER STARTER RELAY VOLTAGE Measure the voltage between the Yellow/red wire terminal (+) of the harness side 2P connector and YELLOW/RED(+) ground (). If the battery voltage appears only when the starter switch is pushed with the ignition switch ON, the circuit is normal.
  • Page 438 '61HN252' by American Honda Motor Co. - Page 438 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:22 PM...
  • Page 439: Lights/Meters/Switches

    '61HN252' by American Honda Motor Co. - Page 439 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES COMPONENT LOCATION ························ 22-2 COMBINATION METER/REAR VEHICLE SPEED SENSOR (VSS) ·························· 22-13 SERVICE INFORMATION ························· 22-3 FUEL GAUGE/FUEL LEVEL SENSOR ··· 22-15 ASSIST HEADLIGHT································· 22-4 TEMPERATURE INDICATOR ·················...
  • Page 440 '61HN252' by American Honda Motor Co. - Page 440 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES LIGHTS/METERS/SWITCHES COMPONENT LOCATION HANDLEBAR SWITCH IGNITION SWITCH COMBINATION METER REVERSE SWITCH FRONT BRAKE (INHIBITOR) SWITCH ECT SENSOR CARBURETOR HEATER FRONT VEHICLE SPEED SENSOR REAR VEHICLE...
  • Page 441 '61HN252' by American Honda Motor Co. - Page 441 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES SERVICE INFORMATION GENERAL · A continuity test can be made with the switches installed on the vehicle. · All plastic connectors have locking tabs that must be released before disconnecting, and must be aligned when recon- necting.
  • Page 442: Assist Headlight

    '61HN252' by American Honda Motor Co. - Page 442 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES ASSIST HEADLIGHT BULB REPLACEMENT Remove the screw. HOSE Release the four tabs of the assist headlight upper UPPER COVER TABS cover from the slits in the front and lower covers.
  • Page 443 '61HN252' by American Honda Motor Co. - Page 443 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES HEADLIGHT BULB REPLACEMENT Remove the screw and headlight case cover cap. HEADLIGHT COVER CAP SCREW Remove the dust cover. BULB DUST COVER Remove the bulb socket and bulb.
  • Page 444 '61HN252' by American Honda Motor Co. - Page 444 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES Install the headlight cover cap while aligning its tab HEADLIGHT COVER CAP with the headlight cover groove as shown. Align Install and tighten the headlight case cover cap...
  • Page 445 '61HN252' by American Honda Motor Co. - Page 445 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES Turn the bulb socket counterclockwise and remove Turn the taillight bulb counterclockwise while push- ing it in, then remove the bulb from the socket.
  • Page 446: Accessory Socket

    '61HN252' by American Honda Motor Co. - Page 446 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES ACCESSORY SOCKET INSPECTION Remove the front fender (page 2-11). 2P (BLACK) CONNECTOR Remove the accessory socket 2P (Black) connector from the frame. Measure the voltage between the White/black (+) and Green () wire terminals of the wire harness side connector.
  • Page 447: Ignition Switch

    '61HN252' by American Honda Motor Co. - Page 447 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES IGNITION SWITCH INSPECTION Remove the front fender (page 2-11). Remove the ignition switch 4P connector from the '05, '06: 4P CONNECTOR frame and disconnect it.
  • Page 448: Handlebar Switch

    '61HN252' by American Honda Motor Co. - Page 448 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES HANDLEBAR SWITCH INSPECTION Remove the front fender (page 2-11). Remove the handlebar switch 10P (Green) connec- '05, '06: '05, '06 shown: tor from the frame and disconnect it.
  • Page 449: Carburetor Heater

    '61HN252' by American Honda Motor Co. - Page 449 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES CARBURETOR HEATER INSPECTION Remove the front fender (page 2-11). Remove the carburetor heater switch 2P (RED) con- nector from the holder and disconnect it.
  • Page 450: Carburetor Heater Switch

    '61HN252' by American Honda Motor Co. - Page 450 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES CARBURETOR HEATER SWITCH INSPECTION Remove the front fender (page 2-11). TRIM CLIP Remove the trim clips and radiator grille side guard. RADIATOR SIDE GUARD Disconnect the carburetor heater switch 2P (Red) connector.
  • Page 451 '61HN252' by American Honda Motor Co. - Page 451 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES COMBINATION METER/REAR VEHICLE SPEED SENSOR (VSS) POWER/GROUND LINE INSPECTION Remove the front fender (page 2-11). '05, '06 shown: Remove the combination meter 14P (Gray) connec- tor from the frame and disconnect it.
  • Page 452 '61HN252' by American Honda Motor Co. - Page 452 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES · If the pulse voltage appears, check as follows: Remove the combination meter 14P (Gray) connec- tor from the frame and disconnect it. '05, '06 shown:...
  • Page 453: Fuel Gauge/Fuel Level Sensor

    '61HN252' by American Honda Motor Co. - Page 453 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES Disconnect the GPS receiver 6P connector (GPS CONNECTOR model only). Remove the three nuts and combination meter bracket. Installation is in the reverse order of removal.
  • Page 454 '61HN252' by American Honda Motor Co. - Page 454 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES With the fuel level sensor float at the top "FULL" FLOAT position, turn the ignition switch to ON and check the fuel gauge. (FULL)
  • Page 455: Temperature Indicator

    '61HN252' by American Honda Motor Co. - Page 455 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES Install the sensor into the fuel tank while aligning Align the groove in the plate with the boss on the fuel tank. Install and tighten the bolts.
  • Page 456 '61HN252' by American Honda Motor Co. - Page 456 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES Temperature indicator does not come on when the ignition switch is turned ON Disconnect the engine control module (ECM) 21P '05, '06 shown: 21P (GRAY) CONNECTOR...
  • Page 457 '61HN252' by American Honda Motor Co. - Page 457 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES If the motor does not stop, disconnect the engine 21P (BLACK) CONNECTOR '05, '06 shown: control module (ECM) 21P connector and check for short circuit in Black/blue wire between the ECM and engine coolant temperature (ECT) sensor.
  • Page 458: Engine Oil Temperature (Eot) Sensor

    '61HN252' by American Honda Motor Co. - Page 458 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES If the motor does not start, remove the right front mud guard and right inner fender (page 2-9), disconnect the fan motor 2P connector. Measure the voltage between the harness side Blue wire termi- nal (+) and ground ().
  • Page 459 '61HN252' by American Honda Motor Co. - Page 459 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION Drain the coolant from the engine (page 6-5). CONNECTOR Remove the air intake duct (page 6-10). Disconnect the connector and remove the engine coolant temperature (ECT) sensor.
  • Page 460: Reverse Switch

    '61HN252' by American Honda Motor Co. - Page 460 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES REVERSE SWITCH INSPECTION Remove the following: 2P CONNECTOR fuel tank cover (page 2-6) left inner fender (page 2-9) Disconnect the reverse switch 2P connector.
  • Page 461: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 461 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES GPS RECEIVER (GPS model only) INSPECTION The GPS receiver continuously calculates latitude and longitude when the ignition switch is in the ON position as a result, the start-up time of the position...
  • Page 462 '61HN252' by American Honda Motor Co. - Page 462 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES 2. GPS RECEIVER INPUT VOLTAGE INSPECTION Disconnect the GPS receiver 6P (Natural) con- nector. Turn the ignition switch ON. Measure the voltage at the meter side connector terminal and ground.
  • Page 463: Brake Light Switch

    '61HN252' by American Honda Motor Co. - Page 463 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES 2. GPS RECEIVER BACKUP VOLTAGE INSPECTION Turn the ignition switch OFF. Remove the combination meter assembly (page 22-14). Disconnect the GPS receiver 6P (Natural) con- nector.
  • Page 464: Front Brake Switch

    '61HN252' by American Honda Motor Co. - Page 464 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES REAR BRAKE LEVER Disconnect the rear brake lever switch connectors CONNECTORS and check for continuity between the switch termi- nals. There should be continuity with the rear brake lever squeezed and no continuity with the lever released.
  • Page 465: Horn Switch (U Type Only)

    '61HN252' by American Honda Motor Co. - Page 465 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] LIGHTS/METERS/SWITCHES HORN SWITCH (U type only) Disconnect the horn switch wire connectors. '05'06 shown: CONNECTORS Check the continuity between the connector termi- HORN SWITCH nals.
  • Page 466 '61HN252' by American Honda Motor Co. - Page 466 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:25 PM...
  • Page 467: Selectable 4Wd System

    '61HN252' by American Honda Motor Co. - Page 467 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM COMPONENT LOCATION ························ 23-2 PROBLEM CODE INDEX ·························· 23-4 SYSTEM DIAGRAM ·································· 23-2 TROUBLESHOOTING······························· 23-5 SERVICE INFORMATION ························· 23-3 REAR VEHICLE SPEED SENSOR (VSS) 23-11 BEFORE STARTING TROUBLESHOOTING ···································································...
  • Page 468: Component Location

    '61HN252' by American Honda Motor Co. - Page 468 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM SELECTABLE4WDSYSTEM COMPONENT LOCATION COMBINATION METER 2WD/4WD (4WD INDICATOR) SELECT SWITCH FRONT FINAL CLUTCH ENGINE CONTROL BATTERY MODULE (ECM) FRONT VSS REAR VSS...
  • Page 469: Service Information

    '61HN252' by American Honda Motor Co. - Page 469 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM SERVICE INFORMATION GENERAL · The drive mode (2WD or 4WD) is changed electrically by operating the front final clutch with the 2WD/4WD select switch.
  • Page 470: Before Starting Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 470 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM BEFORE STARTING TROUBLESHOOTING SELF-DIAGNOSTIC FUNCTION The engine control module (ECM) that controls the Selectable 4WD system has a self-diagnostic func- tion to constantly monitor the system. The ECM...
  • Page 471: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 471 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM TROUBLESHOOTING PROBLEM CODE 2: FRONT VEHICLE SPEED SENSOR (VSS) · Before troubleshooting, check that the tire pres- sure and tire size are correct.
  • Page 472 '61HN252' by American Honda Motor Co. - Page 472 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM 4. Front VSS Line Short Circuit Inspection Check the Pink/white wire for continuity between Be careful not the ECM 21P (Gray) connector terminal and to bend the ground.
  • Page 473: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 473 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM PROBLEM CODE 3: REAR VEHICLE SPEED SENSOR (VSS) · Before troubleshooting, check that the tire pres- sure and tire size are correct.
  • Page 474 '61HN252' by American Honda Motor Co. - Page 474 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM 4. Rear VSS Line Short Circuit Inspection Check the Pink/green wire for continuity Be careful not between the ECM 21P (Gray) connector terminal to bend the and ground.
  • Page 475: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 475 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM PROBLEM CODE 4: SYSTEM VOLTAGE · Before starting the troubleshooting, check for the following: battery condition (page 19-5) engine idle speed (page 3-15) 1.
  • Page 476 '61HN252' by American Honda Motor Co. - Page 476 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM 2. Front Final Clutch Line Open Circuit Inspection Check the White/red and White/black wires for Be careful not FINAL CLUTCH continuity between the ECM 21P (Black) and...
  • Page 477: Rear Vehicle Speed Sensor (Vss)

    '61HN252' by American Honda Motor Co. - Page 477 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM REAR VEHICLE SPEED SENSOR (VSS) REMOVAL Disconnect the rear VSS 3P (Yellow) connector. 3P (YELLOW) CONNECTOR '05, '06 shown: Remove the two bolts and front final clutch cover.
  • Page 478 '61HN252' by American Honda Motor Co. - Page 478 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] SELECTABLE 4WD SYSTEM Install the front final clutch cover stay onto the REAR VSS CLAMP COVER STAY clutch housing, then install and tighten the three mounting bolts.
  • Page 479: Hondamatic

    '61HN252' by American Honda Motor Co. - Page 479 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC COMPONENT LOCATION ························ 24-2 TROUBLESHOOTING····························· 24-12 SERVICE INFORMATION ························· 24-3 GEAR POSITION SWITCH ····················· 24-37 CONNECTOR LOCATION ························· 24-4 ESP SHIFT SWITCH································ 24-38 CIRCUIT DIAGRAM··································· 24-5 MODE SELECT SWITCH ························...
  • Page 480 '61HN252' by American Honda Motor Co. - Page 480 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC HONDAMATIC COMPONENT LOCATION DRIVE MODE SELECT SWITCH COMBINATION METER ESP SHIFT SWITCH IGNITION SWITCH GEARSHIFT LEVER ENGINE CONTROL MODULE (ECM) THROTTLE POSITION SENSOR BATTERY...
  • Page 481: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 481 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC SERVICE INFORMATION GENERAL · This section covers service of the electrical system of the Hondamatic. The automatic transmission unit of the Hon- damatic is mounted inside the crankcase. Removal/installation of the automatic transmission is accomplished by sepa- rating the crankcase (page 13-8).
  • Page 482: Connector Location

    '61HN252' by American Honda Motor Co. - Page 482 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC CONNECTOR LOCATION Refer to page 2-3 for the parts that must be removed for serviced. For example: Front VSS 3P Electrical component Inner fender...
  • Page 483: Circuit Diagram

    '61HN252' by American Honda Motor Co. - Page 483 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC CIRCUIT DIAGRAM Battery voltage VCC 1 Voltage center 4WD switch channel 1 SWITCH VB_M Main battery volt- RATIO Ratio voltage OND_P Final clutch power...
  • Page 484: Initial Setting Procedure

    '61HN252' by American Honda Motor Co. - Page 484 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC INITIAL SETTING PROCEDURE · After removal/installation or replacement of any of the following parts, perform the initial setting below. TP sensor Angle sensor Carburetor*...
  • Page 485 '61HN252' by American Honda Motor Co. - Page 485 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 6. Move the drive mode select switch to D1 or D2. DRIVE MODE SELECT SWITCH 7. Turn the ignition switch ON while pushing both...
  • Page 486: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 486 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC BEFORE STARTING TROUBLESHOOTING SELF-DIAGNOSTIC FUNCTION OUTLINE The engine control module (ECM) that controls the Hondamatic system has a self-diagnostic function to constantly monitor the system. The ECM checks the...
  • Page 487: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 487 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC RETRIEVAL/ERASURE OF PROBLEM CODE · The ECM stores up to two problem codes and displays the latest problem code first, and then the earlier code alternately. When the two prob- lem codes are displayed, perform troubleshoot- ing starting with the latest code (i.e, the code...
  • Page 488 '61HN252' by American Honda Motor Co. - Page 488 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM CODE BLINK DURATION, (Indicating a problem code): 1 sec. 1 sec. 1 sec. 3 sec. "--"ON Pattern repeated One Blink Latest problem code...
  • Page 489 '61HN252' by American Honda Motor Co. - Page 489 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM CODE INDEX Problem Refer Detection item code Ignition pulse generator no signal 24-12 Rear VSS no signal 24-14 Gear position (D, L, N, R) circuit multiple ON position (Short)
  • Page 490: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 490 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC TROUBLESHOOTING · The connector location as shown on page 24-4. · Perform inspection with the ignition switch turned OFF, unless otherwise specified. · Check the following before starting troubleshoot- ing.
  • Page 491 '61HN252' by American Honda Motor Co. - Page 491 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 3. Ignition Pulse Generator Line Inspection Turn the ignition switch OFF. Disconnect the ECM 21P (Black) connector and the alternator 5P (Natural) connector. Check for continuity at the Blue/yellow wire between the main harness side connectors.
  • Page 492: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 492 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM CODE 2: VEHICLE SPEED SENSOR (VSS) SYSTEM 1. Mechanical System Inspection Test-ride the vehicle with the gearshift lever in D GEARSHIFT LEVER range.
  • Page 493 '61HN252' by American Honda Motor Co. - Page 493 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 4. Rear VSS Input Line Inspection Turn the ignition switch ON. REAR VSS CONNECTOR Measure the voltage between the wire harness (Viewed from the terminal side) side rear VSS 3P (Yellow) connector terminal and ground.
  • Page 494 '61HN252' by American Honda Motor Co. - Page 494 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 8. System Failure Reproduction Connect all connectors. GEAR POSITION INDICATOR Test-drive the vehicle under the following condi- tions: Gearshift lever in D range Mode select switch at ESP/1st...
  • Page 495 '61HN252' by American Honda Motor Co. - Page 495 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 2. Gear Position Switch Line Inspection 1 Check for continuity between each gear position switch wire terminal of the ECM connector and '05, '06 shown: ground.
  • Page 496 '61HN252' by American Honda Motor Co. - Page 496 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM CODE 4: THROTTLE POSITION (TP) SENSOR SYSTEM 1. TP Sensor Connection Inspection Check for loose or poor contact on the ECM 21P ECM 21P (GRAY) CONNECTOR (Gray) connector.
  • Page 497 '61HN252' by American Honda Motor Co. - Page 497 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 4. TP Sensor Installation Condition Check installation condition of the TP sensor TP SENSOR (page 24-40). Is it installed certainly? Install properly or replace the faulty part...
  • Page 498 '61HN252' by American Honda Motor Co. - Page 498 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 8. System Failure Reproduction Connect all connectors. GEAR POSITION INDICATOR Turn the ignition switch ON. Check the gear position indicator. Is problem code 4 indicated? ·...
  • Page 499 '61HN252' by American Honda Motor Co. - Page 499 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 2. Initial Setting Procedure Perform initial setting procedure (page 24-6). Is initial setting procedure completed? GO TO STEP 4. GO TO STEP 3. 3. ESP Shift Switch Operation Inspection...
  • Page 500 '61HN252' by American Honda Motor Co. - Page 500 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 6. Control Motor Line Inspection Disconnect the ECM 5P (Black) connector and the control motor 2P (Natural) connector. Check for continuity on the Green/red wire and the Orange wire between the ECM connector and main harness side motor connector.
  • Page 501 '61HN252' by American Honda Motor Co. - Page 501 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 9. Automatic Transmission Operation Inspection Disconnect the angle sensor 3P (Black) connec- tor. Measure the resistance at the angle sensor con- nector with the sensor installed in the crankcase.
  • Page 502 '61HN252' by American Honda Motor Co. - Page 502 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 11. Angle Sensor Line Inspection 1 Disconnect the ECM 21P (Gray) connector and the angle sensor 3P (Black) connector. Check for continuity on the Black/red wire and...
  • Page 503 '61HN252' by American Honda Motor Co. - Page 503 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM CODE 6: ANGLE SENSOR SYSTEM (AUTOMATIC TRANSMIS- SION SWASH PLATE ANGLE) 1. Angle Sensor Connection Inspection Check for loose or poor contact on the ECM 21P ECM 21P (GRAY) CONNECTOR (Gray) connector.
  • Page 504 '61HN252' by American Honda Motor Co. - Page 504 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 3. Angle Sensor Line Inspection 1 Disconnect the ECM 21P (Gray) connector and the angle sensor 3P (Black) connector. Check for continuity on the Black/Red wire and...
  • Page 505 '61HN252' by American Honda Motor Co. - Page 505 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 7. Angle Sensor Resistance Inspection 2 Remove the angle sensor (page 24-41). Check that the resistance at the angle sensor ter- minal varies while turning the sensor joint.
  • Page 506 '61HN252' by American Honda Motor Co. - Page 506 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC Check for loose or poor contact on the handlebar '05, '06: switch 10P (Green) connector. Check for loose or poor contact on the handlebar...
  • Page 507 '61HN252' by American Honda Motor Co. - Page 507 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 4. ESP Shift Switch Inspection (Handlebar switch side) Check for continuity at the switch side 10P '05, '06: (Green) connector in the same manner as the STEP 2 (page 24-28).
  • Page 508 '61HN252' by American Honda Motor Co. - Page 508 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM CODE 9, 10, 12: ECM VOLT- AGE CONVERTER CIRCUIT, ECM FAIL- SAFE RELAY CIRCUIT, ECM CPU 1. System Failure Reproduction Turn the ignition switch OFF and ON.
  • Page 509 '61HN252' by American Honda Motor Co. - Page 509 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 2. Control Motor Power Input Line Inspection Turn the ignition switch OFF. Disconnect the ECM 5P (Black) connector. Turn the ignition switch ON. Measure the voltage between the wire harness side connector terminal and ground.
  • Page 510 '61HN252' by American Honda Motor Co. - Page 510 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 6. System Failure Reproduction Connect all connectors. GEAR POSITION INDICATOR Turn the ignition switch ON. Check the gear position indicator. Is problem code 12 indicated? ·...
  • Page 511 '61HN252' by American Honda Motor Co. - Page 511 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 2. Mode Select Switch Line Inspection Turn the ignition switch OFF. Disconnect the ECM 21P (Black) connector Check for continuity ECM 21P (Black) connector terminals of the wire harness side with the mode select switch in each mode position.
  • Page 512: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 512 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC PROBLEM INDICATED (MODE 1), BUT NO CODE IS RETRIEVABLE Gear position indicator blinks indicating a problem, but the problem code is not displayed by the retrieval procedure: 1.
  • Page 513 '61HN252' by American Honda Motor Co. - Page 513 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC Check for loose or poor contact on the combina- GEAR POSITION INDICATOR tion meter 14P (Gray) connector, gear position switch 4P (Natural) connector and mode select switch 4P (Black) connector.
  • Page 514 '61HN252' by American Honda Motor Co. - Page 514 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 4. Mode Select Switch Line Inspection Turn the ignition switch OFF. Disconnect the ECM 21P (Black) connector Check for continuity ECM 21P (Black) connector terminals of the wire harness side with the mode select switch in each mode position.
  • Page 515: Gear Position Switch

    '61HN252' by American Honda Motor Co. - Page 515 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC 7. Meter Line Short Circuit Inspection Connect the ECM 21P (Gray) connector. Put the gear shift lever in the D range and the mode select switch at ESP.
  • Page 516: Esp Shift Switch

    '61HN252' by American Honda Motor Co. - Page 516 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC REPLACEMENT Shift the sub-transmission into neutral. GEAR POSITION O-RING Remove the two bolts and gear position switch from SWITCH the crankcase cover. Remove the O-ring.
  • Page 517: Mode Select Switch

    '61HN252' by American Honda Motor Co. - Page 517 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC MODE SELECT SWITCH INSPECTION Turn the ignition switch OFF. ECM 21P (BLACK) CONNECTOR Disconnect the ECM 21P (Black) connector. Check for continuity between the ECM connector terminals in each switch position.
  • Page 518: Throttle Position (Tp) Sensor

    '61HN252' by American Honda Motor Co. - Page 518 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC THROTTLE POSITION (TP) SENSOR REMOVAL/INSTALLATION · Do not loosen the throttle position sensor attach- BRACKET SCREWS ing shear bolts unless the throttle position sen- sor requires replacement.
  • Page 519: Angle Sensor

    '61HN252' by American Honda Motor Co. - Page 519 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC Check the engine idle speed and adjust it if neces- TP SENSOR SHEAR BOLTS sary (page 3-15). Adjust the TP sensor position so that the resistance between terminals A and B is 580 620 Ω, and...
  • Page 520 '61HN252' by American Honda Motor Co. - Page 520 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC REPLACEMENT Remove the left engine side cover (page 10-5). ANGLE SENSOR BOLTS Clean around the sensor base with compressed air before removing the angle sensor.
  • Page 521: Control Motor

    '61HN252' by American Honda Motor Co. - Page 521 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC CONTROL MOTOR REMOVAL/INSTALLATION Remove the inner fender (page 2-9). 2P (NATURAL) CONNECTOR Disconnect the control motor 2P (Natural) connec- tor. '05, '06 shown: Remove the left engine side cover (page 10-5).
  • Page 522: Engine Control Module (Ecm)

    '61HN252' by American Honda Motor Co. - Page 522 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] HONDAMATIC Route the motor and angle sensor wires properly Do not forget to 2P (NATURAL) CONNECTOR secure the wires and connect the motor 2P (Natural) con- (page 1-22) nector.
  • Page 523: Wiring Diagrams

    '61HN252' by American Honda Motor Co. - Page 523 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS '05'06 Standard model (A type, CM type) After '06 Standard model (A, CM type) · 25-6 ··································································· 25-3 After '06 Standard model (U type) ········· 25-7 '05'06 Standard model (U type) ············...
  • Page 524 '61HN252' by American Honda Motor Co. - Page 524 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS WIRINGDIAGRAMS '05'06 Standard model (A type, CM type) 25-3 1 of 1 3/9/2008 11:32 PM...
  • Page 525 '61HN252' by American Honda Motor Co. - Page 525 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS '05'06 Standard model (U type) 25-4 1 of 1 3/9/2008 11:32 PM...
  • Page 526 '61HN252' by American Honda Motor Co. - Page 526 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS '05'06 GPScape model 25-5 1 of 1 3/9/2008 11:32 PM...
  • Page 527 '61HN252' by American Honda Motor Co. - Page 527 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS After '06 Standard model (A, CM type) 25-6 1 of 1 3/9/2008 11:32 PM...
  • Page 528 '61HN252' by American Honda Motor Co. - Page 528 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS After '06 Standard model (U type) 25-7 1 of 1 3/9/2008 11:32 PM...
  • Page 529 '61HN252' by American Honda Motor Co. - Page 529 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] WIRING DIAGRAMS After '06 GPScape model (A, CM type) 25-8 1 of 1 3/9/2008 11:32 PM...
  • Page 530 '61HN252' by American Honda Motor Co. - Page 530 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:32 PM...
  • Page 531: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 531 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] TROUBLESHOOTING ENGINE DOES NOT START OR IS HARD TO POOR PERFORMANCE AT LOW AND IDLE START ······················································· 26-2 SPEED ······················································· 26-5 ENGINE LACKS POWER ·························· 26-3 POOR PERFORMANCE AT HIGH SPEED 26-6 POOR HANDLING ····································...
  • Page 532: Engine Does Not Start Or Is Hard To Start

    '61HN252' by American Honda Motor Co. - Page 532 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] TROUBLESHOOTING TROUBLESHOOTING ENGINE DOES NOT START OR IS HARD TO START 1. Fuel Line Inspection Check fuel flow to carburetor. Does fuel reach carburetor? · Clogged fuel line or strainer ·...
  • Page 533: Engine Lacks Power

    '61HN252' by American Honda Motor Co. - Page 533 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] TROUBLESHOOTING ENGINE LACKS POWER 1. Drive Train Inspection Raise wheel off the ground and spin by hand. Does the wheel spin freely? · Brake dragging ·...
  • Page 534: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 534 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] TROUBLESHOOTING 7. Cylinder Compression Inspection Test cylinder compression. Is the compression low? · Valve clearance too small · Valve stuck open · Worn cylinder and piston rings ·...
  • Page 535: Poor Performance At Low And Idle

    '61HN252' by American Honda Motor Co. - Page 535 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] TROUBLESHOOTING POOR PERFORMANCE AT LOW AND IDLE SPEED 1. Pilot Screw Inspection Check carburetor pilot screw adjustment. Is the adjustment correct? See page 5-19 GO TO STEP 2.
  • Page 536: Poor Performance At High Speed

    '61HN252' by American Honda Motor Co. - Page 536 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] TROUBLESHOOTING POOR PERFORMANCE AT HIGH SPEED 1. Fuel Line Inspection Disconnect fuel line at carburetor. Does fuel flow freely? · Clogged fuel line · Clogged fuel tank breather hose ·...
  • Page 537: 27. Index

    '61HN252' by American Honda Motor Co. - Page 537 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] 27. INDEX ACCESSORY SOCKET ··············································· 22-8 CYLINDER HEAD/VALVE/CAMSHAFT AIR CLEANER······························································· 3-6 SPECIFICATIONS ························································ 1-8 AIR CLEANER HOUSING ············································ 5-5 CYLINDER/PISTON INSTALLATION ·························· 9-9 AIR CLEANER HOUSING DRAIN HOSE ····················· 3-8 CYLINDER/PISTON REMOVAL···································...
  • Page 538: Troubleshooting

    '61HN252' by American Honda Motor Co. - Page 538 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] INDEX HORN SWITCH (U type only)··································22-27 REAR WHEEL/SUSPENSION································ 15-3 IGNITION COIL ···························································20-7 SELECTABLE 4WD SYSTEM································ 23-3 IGNITION SWITCH ·····················································22-9 SUB-TRANSMISSION/GEARSHIFT LINKAGE····· 12-3 IGNITION SYSTEM INSPECTION ·····························20-5 SERVICE RULES ··························································...
  • Page 539 '61HN252' by American Honda Motor Co. - Page 539 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] INDEX POOR PERFORMANCE AT LOW AND IDLE VALVE SEAT INSPECTION/REFACING···················· 8-13 SPEED ···································································· 26-5 WATER PUMP ··························································· 6-12 REAR DRIVING MECHANISM ······························ 18-6 WHEELS/TIRES·························································· 3-25 REAR WHEEL/SUSPENSION································...
  • Page 540 '61HN252' by American Honda Motor Co. - Page 540 of 540 http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2... [2005-2008] [TRX500 FA/FGA] MEMO 1 of 1 3/9/2008 11:34 PM...

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