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Yamaha RST90K Owner's Manual

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SNOWMOBILE
OWNER'S MANUAL
RST90K
LIT-12628-02-39
8ET-28199-10

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  • Page 1 SNOWMOBILE OWNER’S MANUAL RST90K LIT-12628-02-39 8ET-28199-10...
  • Page 3 Record the frame number, engine number (Primary ID), and key number in the spaces provided for assistance when ordering spare parts from a Yamaha dealer. 1 The frame number is the seventeen-digit number stamped on the frame of the snowmobile. (See fig.
  • Page 4 ESU00011 I NTRODUCTION Congratulations on your purchase of a Yamaha snowmo- bile. This model is the result of Yamaha’s vast experience in the production of fine sporting and touring snowmo- biles. It represents the high degree of craftsmanship and reliability that have made Yamaha a leader in these fields.
  • Page 5 PLEASE READ AND UNDERSTAND THIS MANUAL COMPLETELY BEFORE OPERATING THE SNOWMO- BILE. NOTE: Yamaha continually seeks advancements in product design and quality. Therefore, while this manual con- tains the most current product information available at the time of printing, there may be minor discrepan- cies between your snowmobile and this manual.

  • Page 6: Table Of Contents

    YAMAHA MOTOR Drive guard ........5-12 CORPORATION, U.S.A. V-belt holders ........5-13 SNOWMOBILE LIMITED Storage areas ........5-13 WARRANTY ........1-1 PRE-OPERATION CHECKS....6-1 YAMAHA EXTENDED SERVICE Fuel ..........6-1 (Y.E.S.) ..........1-4 Engine oil.........6-2 Engine oil level ........6-3 Coolant ..........6-4 LOCATION OF THE IMPORTANT Throttle lever ........6-5 LABELS..........2-1...
  • Page 7 Maximizing drive track life ....7-7 WIRING DIAGRAM ......12-1 Driving ..........7-8 Stopping the engine......7-9 Transporting ........7-10 PERIODIC MAINTENANCE ....8-1 Periodic maintenance chart .....8-1 Tool kit ..........8-4 Spark plug inspection ......8-4 Engine idle speed adjustment ..8-6 Throttle cable adjustment ....8-6 Carburetor adjustment.....8-7 High altitude adjustments ....8-9 Adjusting the valve clearance..8-9 Changing the engine oil....8-10...

  • Page 8: Yamaha Motor Corporation, U.s.a. Snowmobile Limited Warranty

    ESU00004 Y AMAHA MOTOR CORPORATION, U.S.A. SNOWMOBILE LIMITED WARRANTY CW-01E...
  • Page 9 CW-02E...
  • Page 10 CW-03E...

  • Page 11: Yamaha Extended Service (Y.e.s.)

    ESU04280 YAMAHA EXTENDED SERVICE (Y.E.S.) CW-06E...

  • Page 12: Location Of The Important Labels

    ESU04050 L OCATION OF THE IMPORTANT LABELS Please read the following labels carefully before operat- ing this snowmobile. NOTE: Maintain or replace safety and instruction labels, as nec- essary.
  • Page 13 NOTE: The following suspension adjustment charts are included with the Owner’s Manual.

  • Page 14: Safety Information

    1. Read the Owner’s Manual and all labels before oper- ating this snowmobile. Become familiar with all of the operating controls and their function. Consult a Yamaha dealer about any control or function you do not understand. 2. This snowmobile was not manufactured for use on public streets, roads, or highways.
  • Page 15 7. Handle fuel with care; it is HIGHLY FLAMMABLE. Never add fuel when the engine is running or hot. Allow the engine to cool for several minutes after running. Use an approved fuel container. Fill the fuel tank outdoors with extreme care. Never remove the fuel cap indoors.
  • Page 16 Fuel may leak out from the fuel breather hose. 2. Modifications made to the snowmobile not approved by Yamaha, or the removal of original equipment may render your snowmobile unsafe for use that may cause severe personal injury. Modifications may also make the snowmobile illegal to use.

  • Page 17: Description

    ESU00012 D ESCRIPTION 1 Windshield 2 Steering handlebar 3 Seat 4 Passenger grip warmer switch 5 Large solo touring storage area 6 Rear carrier 7 Frame 8 Slide rail suspension 9 Drive track 0 Skis A Headlights B Shroud C Storage compartment...
  • Page 18 D Side mirror E Tail/brake lights F Snow flap G Brake lever H Parking brake lever I Grip warmer adjustment switch J Headlight beam switch K Engine stop switch L Thumb warmer adjustment switch M Throttle lever N Shift lever O Shroud latch P Main switch Q Auxiliary DC jack...

  • Page 19: Control Functions

    ESU00013 C ONTROL FUNCTIONS ESU00362 Main switch The main switch controls the following items. 1 “OFF” The ignition circuit is switched off. The key can be removed only in this position. 2 “ON” The ignition circuit is switched on. 3 “START” The starting circuit is switched on.

  • Page 20: Starter Lever (Choke)

    ESU00201 Starter lever (choke) Use the starter lever (choke) when starting and warming up a cold engine. 1 Starter lever (choke) 2 When starting a cold engine. 3 Warming up 4 When the engine is warm. NOTE: Refer the “Starting the engine” section for proper opera- tion.

  • Page 21: Throttle Override System (T.o.r.s.)

    ESU04151 Throttle override system (T.O.R.S.) If the carburetor or throttle cable should malfunction dur- ing operation, the T.O.R.S. will operate when the throttle lever is released. The T.O.R.S. is designed to interrupt the ignition and keep the engine speed between 2,800 and 3,000 r/min if the carburetor fails to return to idle when the lever is released.

  • Page 22: Speedometer Unit

    ESU04160 Speedometer unit The speedometer unit is equipped with the following: a digital speedometer (which shows riding speed) an odometer (which shows the total distance trav- eled) a tripmeter (which shows the distance traveled since it was last set to zero) warning indicators (which show self-diagnosis, cool- ant temperature, fuel level, and oil level warnings) a fuel meter (which shows the fuel remaining in the...

  • Page 23: Fuel Meter And Grip/Thumb Warmer Level Indicator

    ESU03821 Fuel meter and grip/thumb warmer level indica- The fuel meter and grip/thumb warmer level indicator have eight segments 1 which show the amount of fuel remaining in the fuel tank, the grip warmer level, or the thumb warmer level. Fuel meter As the fuel level decreases in the fuel tank, the segments disappear until the level goes down to the last segment...

  • Page 24: Fuel Level Warning Indicator

    The fuel level warning indicator 1, warning light 2, and all segments of the fuel meter 3 warn the rider of the above problems by flashing continuously. When this occurs, have a Yamaha dealer inspect the snowmobile as soon as possible. ESU00377...

  • Page 25: Coolant Temperature Warning Indicator

    If the self-diagnosis warning indicator, warning light, and an error code flash after the engine has been restarted, note the error code, and then have a Yamaha dealer inspect the snowmobile as soon as possible.

  • Page 26: Engine Stop Switch

    ESU00031 Engine stop switch The engine stop switch 1 is used to stop the engine in an emergency. Simply push 2 the stop switch to stop the engine. To start the engine, pull 3 the stop switch and proceed with starting the engine. (See page 7-1 for more details.) During the first few rides, practice using the stop switch so that you can react quickly in an emergency.

  • Page 27: Parking Brake Lever

    ESU00035 Parking brake lever When parking the snowmobile or starting the engine, apply the parking brake by moving the brake lever 1 to the left. To release the parking brake, move the parking brake lever 1 to the right. È To apply the parking brake É...

  • Page 28: Headlight Beam Switch

    ESU00039 Headlight beam switch Push the headlight beam switch to change the headlight beam to high or low. 1 Headlight beam switch 2 Push 3 High beam 4 Low beam ESU04300 Auxiliary DC jack The auxiliary DC jack is located in the front panel and can be used for accessories.

  • Page 29: Passenger Grip Warmer Switch

    ESU04290 Passenger grip warmer switch The passenger grip warmer switch controls the electri- cally heated passenger grips. 1 Passenger grip warmer switch 2 Off 3 “HI” High 4 “LO” Low ESU04311 Footrests The footrests can be installed in two locations to suit pas- senger preference.

  • Page 30: Shroud Latches

    ESU00481 Shroud latches To open the shroud, unhook the shroud latches, and then slowly raise the shroud forward until it stops. When clos- ing the shroud, slowly lower it to its home position, and then hook the shroud latches. 1 Shroud latch 2 Shroud CAUTION : Make sure that all cables and wires are in place when...

  • Page 31: V-Belt Holders

    ESU00053 V-belt holders Keep a spare V-belt for emergency use by placing it into the V-belt holders provided. CAUTION : Make sure that the V-belt is installed securely in the holders. ESU04322 Storage areas This snowmobile is equipped with a storage compart- ment, rear storage area, and rear carrier.
  • Page 32 To remove the passenger seat, backrest, and rear carrier 1. Pull the carrier lock lever 1 away from the carrier lock bracket, and then push it down to unlock the backrest 2 and the rear carrier 3. 2. Slide both the backrest and the rear carrier forward until they stop, and then remove them.
  • Page 33 1. Install the passenger seat, and then install the pas- senger seat lock knob. 2. Align the holes 1 in the backrest bracket with the bolts 2 on the carrier lock bracket, and then place the backrest on the carrier lock bracket. 3.

  • Page 34: Pre-Operation Checks

    ESU00072 P RE-OPERATION CHECKS NOTE: Pre-operation checks should be made each time the snowmobile is used. WARNING The engine and muffler will be very hot after the engine has been run. Avoid touching the engine and muffler while they are still hot with any part of your body or clothing during inspection or repair.

  • Page 35: Engine Oil

    5% of ethanol can be used, although richer jetting may be required to prevent engine dam- age. Consult a Yamaha dealer. Gasohol contain- ing methanol is not recommended. Make sure that snow or ice does not enter the fuel tank when refueling.

  • Page 36: Engine Oil Level

    ESU03441 Engine oil level The engine oil level should be checked before each use. CAUTION : Do not run the engine with too much or not enough oil in the oil tank. Oil could flow into the air filter case and the engine could be damaged.

  • Page 37: Coolant

    6. Insert the oil level gauge/dipstick into the oil filler hole, and then tighten it securely. 7. Connect the oil level gauge coupler. ESU00086 Coolant Check the coolant level in the coolant reservoir when the engine is cold. If the coolant level is below the “COLD LEVEL”...

  • Page 38: Throttle Lever

    The T.O.R.S. will operate and the engine should run between 2,800 and 3,000 r/min. WARNING If the engine does not run between 2,800 and 3,000 r/min, stop the engine by turning the main switch to the “OFF” position and consult a Yamaha dealer.

  • Page 39: Brake

    Do not operate the snowmobile if you find any problems in the brake system. You could lose braking ability, which could lead to an accident. Ask a Yamaha dealer to inspect and repair the brake system. CAUTION : Make sure that the brake lever end does not project out over the handlebar end.

  • Page 40: Brake Fluid Leakage

    Apply the brake for a few minutes. Check to see if any brake fluid leaks out from the brake hose joints or the master cylinder. WARNING If brake fluid leakage is found, ask a Yamaha dealer for immediate repairs. CAUTION : Brake fluid may deteriorate painted surfaces or plas- tic parts.

  • Page 41: Drive Track

    ESU00097 Drive track Check the drive track for deflection, wear, or damage. Adjust or replace if necessary. (See pages 8-29–8-31 for more details.) WARNING Do not operate the snowmobile if you find damage to the drive track, or if it has been maladjusted. Drive track damage or failure could result in loss of brak- ing ability and snowmobile control, which could cause an accident.

  • Page 42: Skis And Ski Runners

    Check the handlebar for excessive free play: 1. Push the handlebar up and down and back and forth. 2. Turn the handlebar slightly to the right and left. If excessive free play is noticed, consult a Yamaha dealer. ESU00378 Lights Check the lights.

  • Page 43: Air Filter

    ESU00350 Air filter Always check that no snow is under the air filter element. Remove the air filter case cover and take out the air filter element. If there is any snow under the air filter element, remove the snow. Then install the air filter element beneath the holding guides on the case and install the air filter case cover.

  • Page 44: Tool Kit And Recommended Equipment

    ESU00345 Tool kit and recommended equipment It is good practice to carry the tool kit, spare parts, and other necessary equipment with you while riding the snowmobile so that minor repairs can be done if neces- sary. The following should be carried at all times: Tool kit Flashlight Roll of plastic tape...

  • Page 45: Operation

    ESU00112 O PERATION ESU00366 Starting the engine WARNING Be sure to check the “SAFETY INFORMATION” section carefully before starting the engine. Make sure that the parking brake is applied. NOTE: Make sure that the engine stop switch is in the on posi- tion.

  • Page 46: Break-In

    CAUTION : After 800 km (500 mi) of operation, the engine oil must be changed and the oil filter cartridge replaced. If any engine trouble should occur during the engine break-in period, immediately have a Yamaha dealer check the snowmobile.

  • Page 47: Riding Your Snowmobile

    totally familiar with the snowmobile’s han- ESU01272 Riding your snowmobile dling and performance characteristics. Set the parking brake and follow the Getting to know your snowmobile instructions on pages 7-1–7-2 to start the A snowmobile is a rider active vehicle, and engine.

  • Page 48: Turning

    Turning Riding uphill For most snow surfaces, “body English” is You should practice first on gentle slopes. the key to turning. Try more difficult climbs only after you have As you approach a curve, slow down and developed your skill. As you approach a begin to turn the handlebar in the desired hill, accelerate before you start the climb, direction.

  • Page 49: Riding Downhill

    Riding downhill downhill leg on the seat and the foot of your uphill leg on the running board. This position will make it easier for you to shift your body weight as needed. Snow and ice are slippery, so be prepared for the possibility that your snowmobile could begin to slip sideways on the slope.

  • Page 50: Hard-Packed Snow

    Hard-packed snow WARNING It can be more difficult to negotiate on Drive track damage or failure could hard-packed snow as both the skis and result in loss of braking ability and drive track do not have as much traction as snowmobile control, which could cause when the snowmobile is operated on fresh an accident.

  • Page 51: Maximizing Drive Track Life

    Studs may catch on an object and pull out of the track, leaving tears and damage around the already weakened area. To minimize possible dam- age, consult your stud manufacturer for installation and stud pattern recommendations. Yamaha does not recommend track studding.

  • Page 52: Driving

    ESU04360 Driving WARNING Be sure to read the “SAFETY INFORMATION” and “Riding your snowmobile” sections carefully before operating the snowmobile. NOTE: Make sure that the engine is warmed up enough before riding. 1. To select the desired operating position, pull the shift lever out, slide it to “FWD”...

  • Page 53: Stopping The Engine

    2. Release the parking brake by moving the parking brake lever to the right. 3. Press the throttle lever slowly to move the snowmo- bile. 4. Turn the handlebar in the desired direction. 5. Squeeze the brake lever to stop the snowmobile. 6.

  • Page 54: Transporting

    ESU00367 Transporting When transporting your snowmobile on a trailer or in a truck, observe the following recommendations to help protect it from damage: Make sure that the fuel level in the fuel tank is lower than the bottom of the carburetors. Otherwise, the vibration and bumps from the road surface could make it possible for fuel to flow through the carbure- tors into the cylinders.

  • Page 55: Periodic Maintenance

    ∗ Repair if necessary. system (T.O.R.S.) Check operation. Throttle lever 5-2, 6-5 ∗ Repair if necessary. Check for leakage. ∗ Exhaust system Tighten or replace gasket if necessary. ∗ It is recommended that these items be serviced by a Yamaha dealer.
  • Page 56 ∗ Replace if necessary. Check operation. Steering system ∗ Adjust toe-out if necessary. Check operation. Lights 6-9, 8-35 Replace bulbs if necessary. Check condition. ∗ Battery 8-36 Charge if necessary. ∗ It is recommended that these items be serviced by a Yamaha dealer.
  • Page 57 Tool kit and recom- Check for proper placement. 6-11 mended equipment ∗ It is recommended that these items be serviced by a Yamaha dealer. NOTE: Brake fluid replacement: 1. When disassembling the master cylinder or caliper cylinder, replace the brake fluid.

  • Page 58: Tool Kit

    NOTE: If you do not have a torque wrench available during a service operation requiring one, take your snowmobile to a Yamaha dealer to check the torque settings and adjust them if necessary. ESU00368 Spark plug inspection The spark plug is an important engine component and is easy to inspect.
  • Page 59 Spark plugs are produced in several different thread lengths. The thread length or reach is the distance from the spark plug gasket seat to the end of the threaded portion. If the reach is too long, overheating and engine damage may result. If the reach is too short, spark plug fouling and poor performance may result.

  • Page 60: Engine Idle Speed Adjustment

    ESU00370 Engine idle speed adjustment CAUTION : Be sure to have a Yamaha dealer make this adjustment. Make sure that the throttle lever moves smoothly. Make sure that the carburetor is synchronized first. 1. Start the engine and warm it up.

  • Page 61: Carburetor Adjustment

    ESU04190 Carburetor adjustment CAUTION : Be sure to have a Yamaha dealer make this adjustment. Make sure that the air filter case is installed dur- ing running to prevent engine damage. Under some operating conditions the carburetor setting may have to be changed due to air temperature changes, elevation changes, use of alcohol oxygenated fuels, etc.,...
  • Page 62 Main jet replacement Replace the main jet according to the setting chart which is available at a Yamaha dealer. WARNING Never remove the drain plug or the float chamber while the engine is hot. Fuel will flow out from the float chamber which could ignite and cause injury.

  • Page 63: High Altitude Adjustments

    If you plan to operate your snowmobile at an altitude different from the area where you bought it, be sure to consult a Yamaha dealer. They can tell you if there are any changes necessary for the altitude where you plan to ride.

  • Page 64: Changing The Engine Oil

    ESU04200 Changing the engine oil It is recommended to have a Yamaha dealer change the engine oil. WARNING Engine oil is extremely hot immediately after the engine is turned off. Coming into contact with or get- ting any engine oil on your clothes could result in burns.
  • Page 65 7. Remove the oil filter cartridge 9 with an oil filter wrench. NOTE: An oil filter wrench is available at a Yamaha dealer. 8. Apply a thin coat of engine oil to the O-ring of the new oil filter cartridge.
  • Page 66 If oil is leaking or the oil level warning indicator comes on when the engine is running, immediately turn the engine off and have a Yamaha dealer check the snowmobile. Continuing to operate the engine under such conditions could cause severe engine damage.

  • Page 67: Cooling System

    The cooling system must be bled of air if the coolant reservoir becomes empty, if air can be seen in the cooling system, or if there is a cooling system leak. Consult a Yamaha dealer. CAUTION : Operating the engine with an improperly bled cool- ing system can cause overheating and severe engine damage.
  • Page 68 3. Fill the coolant reservoir with coolant until it reaches the “COLD LEVEL” mark. 4. Install the coolant reservoir cap. Check for any cool- ant leakage. NOTE: If you find any leaks, consult a Yamaha dealer. 8-14...

  • Page 69: V-Belt Replacement

    Adjust the V-belt position by removing or adding a spacer 1 on each adjusting bolt. Have a Yamaha dealer make this adjustment. CAUTION : As the V-belt wears, adjustment may be necessary. To ensure proper clutch performance, the V-belt...
  • Page 70 3. Pull 3 the V-belt up over the secondary fixed sheave. 4. Remove the V-belt from the secondary sheave assembly and primary sheave assembly. 5. Put the new V-belt back on the secondary sheave assembly only. Do not force the V-belt between the sheaves;...

  • Page 71: Checking The Drive Chain Housing Oil Level And The Drive Chain Tension

    8. Install the V-belt over the primary sheave assembly. 9. Rotate the secondary sliding sheave clockwise 6 and push 7 it so that it separates from the secondary fixed sheave. 10. Install the V-belt 8 between the secondary sliding and secondary fixed sheaves. 11.
  • Page 72 3. Remove the dipstick and check that the oil is between the upper and lower levels. If not, add oil to the upper level. 2 Upper level 3 Lower level Drive chain oil: GL-3 75W or 80W È For models without reverse transmissions (not applicable) É...

  • Page 73: Checking The Brake Pads

    ESU00174 Checking the brake pads Check the brake pads for wear. If the brake pads reach the wear limit, ask a Yamaha dealer to replace them. 1 Brake pad wear indicator Wear limit a: 1.5 mm (0.06 in) ESU00352 Checking the parking brake pads Check the parking brake pads for wear by measuring the thickness of the pads.

  • Page 74: Checking The Brake Fluid Level

    Water will significantly lower the boiling point of the fluid and may result in vapor lock. If the brake fluid level goes down, consult a Yamaha dealer. CAUTION : Brake fluid may deteriorate painted surfaces or plas- tic parts.
  • Page 75 ESU03041 Ski spring preload adjustment The spring preload can be adjusted by turning the spring preload adjuster 1. CD-10E Spring adjuster position 2 Hard Soft 3 Preload Standard CAUTION : The left and right ski spring preload must be set to the same setting.
  • Page 76 The spring preload can be adjusted by turning the spring preload adjuster 3 on the front and rear shock absorb- ers. WARNING Be sure to have a Yamaha dealer make this adjust- ment. CD-13E Spring adjuster position Preload...
  • Page 77 ESU04220 Control rod adjustment The weight transfer can be adjusted by turning the con- trol rod adjusting nut 1. 1. Loosen the locknut 2 while holding the control rod adjusting nut. 2. Turn the adjusting nut in direction a to increase weight transfer or direction b to decrease weight transfer.
  • Page 78 ESU04341 2-up adjusting block spring force adjustment The spring force can be adjusted by changing the posi- tion of the 2-up adjusting blocks. NOTE: Be sure to make this adjustment when there is no load (rider or cargo) on the snowmobile. 1.

  • Page 79: Drive Track Adjustment

    ESU03531 Drive track adjustment WARNING A broken track, track fittings or debris thrown by the drive track could be dangerous to an operator or bystanders. Observe the following precautions: Do not allow anyone to stand behind the snow- mobile when the engine is running. When the rear of the snowmobile is raised to allow the drive track to spin, a suitable stand must be used to support the rear of the snowmo-...
  • Page 80 Drive track adjustment WARNING Be sure to have a Yamaha dealer make this adjustment. Support the snowmobile securely on a suitable stand before working underneath the snowmo- bile. Operate the engine in a well-ventilated area. 1. Lift the rear of the snowmobile onto a suitable stand to raise the drive track off the ground.

  • Page 81: Ski Alignment

    2. Check the following for ski alignment: a. Skis are facing forward. b. Ski toe-out (1 – 2) is within specification. Ski toe-out (1 – 2): 0–15 mm (0–0.59 in) 3. If the alignment is not correct, consult a Yamaha dealer. ESU03541 Handlebar adjustment 1.
  • Page 82 3. Move the handlebar up or down to adjust the handle- bar height to the desired position. CAUTION : Make sure that the projection on the handlebar is not installed into the area a shown. 4. Tighten the handlebar bolts and install the handlebar cover.

  • Page 83: Lubrication

    Apply a dab of grease onto the cable end only. Do not grease the throttle cable because it could become frozen, which could cause loss of control. 2 Front suspension 3 Rear suspension WARNING Be sure to have a Yamaha dealer lubricate the front and rear suspensions. 8-29...

  • Page 84: Headlight Bulb Replacement

    ESU00208 Headlight bulb replacement 1. Lift up the shroud. 2. Disconnect the headlight connector. 3. Remove the bulb holder cover. 4. Remove the bulb holder by depressing and turning it counterclockwise. 1 Bulb holder cover 5. Remove the bulb. WARNING Keep flammable products or your hands away from the hot bulb until it cools down.

  • Page 85: Battery

    To charge the battery Have a Yamaha dealer charge the battery as soon as possible if it seems to have discharged. Keep in mind that the battery tends to discharge more quickly if the snowmobile is equipped with electrical accessories.
  • Page 86 CAUTION : Be sure to connect the breather hoses securely when installing the air filter case. NOTE: If the fuse immediately blows again, ask a Yamaha dealer to inspect the snowmobile. 8-32...
  • Page 87 Specified fuses: 9Main fuse: 30 A 0“HEAD” (Headlight) fuse: 20 A A“SIG” (Signal) fuse: 10 A B“DC TERM” (Auxiliary DC jack) fuse: C“C/W” (Carburetor warmer) fuse: 20 A D“IGN” (Ignition) fuse: 15 A E Spare fuses (20 A, 10 A, 15 A, 3 A) F Spare main fuse 8-33...

  • Page 88: Troubleshooting

    Worn or damaged piston and cylinder No fuel in tank ... Supply fuel..Ask a Yamaha dealer to inspect. Clogged fuel line ... Clean fuel line. Clogged carburetor ... Clean carbure- B. Starting the engine with a dis- tor.
  • Page 89 2. Open the shroud. 5. Connect the other end of the red (+) jumper cable to the positive (+) terminal of the booster battery. 6. Connect the black (-) jumper cable to the negative (-) terminal of the booster battery. 7.
  • Page 90 4. Improper fuel flow ... See A.1 above. NOTE: 5. Incorrect V-belt clutch settings for alti- Make sure that both the red (+) lead and tude or conditions ... Ask a Yamaha the black (-) lead are seated securely in the dealer to inspect. lead holders.
  • Page 91 J. Engine does not upshift or down- shift properly or engages harshly 1. Worn or damaged V-belt ... Replace the V-belt or ask a Yamaha dealer to inspect. 2. Incorrect V-belt clutch settings for alti- tude or conditions ... Ask a Yamaha dealer to inspect.

  • Page 92: Storage

    In areas where oxygenated fuel (gaso- WARNING hol) is used, completely drain the fuel Never smoke around the battery system. Ask a Yamaha dealer if further while it is being charged. Sparks information is needed. may ignite the hydrogen gas created by the battery.
  • Page 93 Do not charge the battery quickly. that you have your snowmobile checked Charge the battery for 10 hours at and tuned by a Yamaha dealer. The dealer 1.8 amperes. has the experience and training to help you get the maximum performance and use of 7.

  • Page 94: Specifications

    ESU00228 S PECIFICATIONS 1 1 - ESU00229 Dimensions CS-01E RST90 Overall length 3,135 mm (123.4 in) Overall width 1,225 mm ( 48.2 in) Overall height 1,280 mm ( 50.4 in) Dry weight 272 kg ( 600 lb) Ski stance 1,086 mm ( 42.8 in) ESU00230 Engine CS-02E...

  • Page 95: Chassis

    ESU00231 Chassis CS-03E RST90 Drive track and suspension: Track Molded rubber, fiber glass rod reinforced Width 381 mm (15.0 in) Track deflection 30–35 mm (1.18–1.38 in)/ 100 N (10 kg, 22 lb) Length on ground 985 mm (38.8 in) Suspension type Slide Rail Suspension Drive sprocket Quadruple polyethylene, 9 teeth...

  • Page 96: Electric

    ESU00232 Electric CS-04E RST90 Ignition system Spark plug Type · R · CR8E (NGK) 0.7–0.8 mm (0.028–0.031 in) Battery Capacity YTX20L-BS 12 V 18 A·h Maximum charge rate 1.8 Amperes/hr for 10 hrs Bulb × Quantity 12 V, 60/55 W × 2 Headlight Bulb ×...
  • Page 97 12-1...
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  • Page 99 YAMAHA MOTOR CO., LTD. PRINTED IN JAPAN PRINTED ON RECYCLED PAPER 2004.06 - 1.0×1 CR...

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