Ofna Racing Ultra GTP Instruction Manual
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Ofna Racing Ultra GTP Instruction Manual

Ready-to-rip 1:8 scale nitro powered touring car
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1:8 SCALE NITRO POWERED TOURING CAR
*SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
RTR INSTRUCTION MANUAL

SAFETY PRECAUTIONS

!
This radio control models is not a toy!
- First time builders should seek the advice from people having building experience
in order to assemble the model correctly and to produce it's performance to full
extent.
- Assemble this kit and places out of children's reach!
- Take safety precautions while operating this model. You are responsible
for this models assembly and safe operation!
- Always keep this instruction manual ready at hand for quick reference, even after
completing the assembly.

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Summary of Contents for Ofna Racing Ultra GTP

  • Page 1: Safety Precautions

    1:8 SCALE NITRO POWERED TOURING CAR RTR INSTRUCTION MANUAL SAFETY PRECAUTIONS This radio control models is not a toy! - First time builders should seek the advice from people having building experience in order to assemble the model correctly and to produce it's performance to full extent.
  • Page 2 REQUIRED FOR OPERATION You will need to buy a few items to start the engine and run the car. THINGS NEEDED • Use 20% nitro CAR fuel. Do not use airplane or heli fuels, they will over heat engine. • Buy long glow plugs, like OFNA/PICCO Plug (#51007). Use plugs without idle bar.
  • Page 3 READ THIS BEFORE RUNNING Running a nitro kit is fun and easy, but to make this a safe rusting. • Clear oil and dirt from chassis with a degreaser. and good experience you must observe a few rules. This kit is extremely fast, easily over 40MPH, and can seriously Precautions injure someone if you are not careful.
  • Page 4 ASSEMBLY OF THE THROTTLE LINKAGE SYSTEM #30800 #30530 Plastic Throttle Plastic Throttle * Snap On. Ball Joint 3X3mm 3X3mm 2mm Rod Set Screw Set Screw Throttle Spring #10300 3X3mm Set Screw Alum.Stopper Fuel Tube #10300 ( 6mm ) Alum.Stopper * Align throttle servo same Plastic Collar as shown.

  • Page 5: Shock Assembly

    SHOCK ASSEMBLY 2.6mm Nut * Fit into groove. 2.6 x 5mm Oil Seal Washer Washer Washer Piston *Push onto shock cylinder. 32203 Shock Shaft Dust Pusher, Short * Assembly 4 pieces of the 32237 shock shaft . (Yellow Rubber) Rebuild 32205 * Short shaft Dust &...
  • Page 6 ASSEMBLY OF NEW “K” STYLE DIFFERENTIAL CASE AND GEARS 31324 - FRONT OR REAR DIFF UNIT 30769 30769 Diff. 31325 - CENTER DIFF UNIT Diff. Bevel Gear Bevel Gear ( Large ) 30779 ( Small ) 4 x 10mm 30773 Washer 30769 Diff.
  • Page 7 ASSEMBLY OF THE SPUR GEAR 30110 (Solid Center Drive) 90026 Spur Gear 5 X 5mm Set Screw 33020 Center Gear Shaft 33020 Center Gear Mount 3 x 10mm Screw 7 x 19x 5mm 30170 Ball Bearings Brake Joint, Drive Cup 7 x 19x 5mm Ball Bearings 30170...
  • Page 8 ASSEMBLY OF THE GEAR BOX ( Assemble two gear boxes for front and rear. ) * Place set screw in D cut. 30010 Gear Box 5 x 5mm Screw Set Screw Cement 30630 6 x 13 x 5mm Ball Bearing 30130 Bevel Gear 36730...
  • Page 9 ASSEMBLY OF THE FRONT ARM HOLDER 4x10mm Tapping Screw 3 x 20mm Flat Head Tapping Screw 4 x 15mm Tapping Screw ( Small Head ) 4 x 15mm 4 x 10mm 30160 Tapping Screw Tapping Screw Front Lower ( Small Head ) ( Small Head ) Arm Holder 36901...
  • Page 10 ASSEMBLY OF THE FRONT ARM ONTO GEAR BOX Assembly of the right and left hand side are the same. 3x25mm Flange Nut Cap Screw E-Ring 3 x 20mm Cap Screw 5 x 5mm Set Screw 3 mm E-Ring M3 Flange Nut ( Steel ) 30151 5x5mm...
  • Page 11 ASSEMBLY OF THE REAR SHOCK TOWER 34009 Rear Shock Tower, GTP & WII 3 x 20mm Flat Head Screw 30340 Stabilizer Bar 30351 Rear Lower Arm * Insert stabilizer before Holder assembly of the shock tower 4x16mm * Don't over tighten tapping screw. Flat Head Tapping Screw Nylon...
  • Page 12 ASSEMBLY OF THE REAR HUB * Builds two upper Rods for left and right side. 36081 Rear Hub 36880 5x60mm Turnbuckle 36690 36053 8 x 16 x 5 7mm Plastic Ball Bearings Arm Ball End 36082 36690 Rear Wheel 7mm Plastic Axle Shaft Arm Ball End 36053...
  • Page 13 ASSEMBLY OF THE REAR UPPER ARM ROD Assembly of the right and left hand side are the same. 3 x 20mm Nylon 3 x 20mm Cap Screw Lock Nut Cap Screw 3 X 25mm Cap Screw Nylon Lock Nut Flange Nut * Insert into rear hub.
  • Page 14 ASSEMBLY OF THE SERVO SAVER (36740 Servo Saver Plastic parts) 36743 3 x 15mm 36740 E-Ring Screw Servo Saver 36742 Horn A Servo Saver Bushing 36743 E-Ring 36742 Servo Saver 36740 Bushing Servo Saver Horn B 36740 Servo Saver Top Adapter 36740 36741 Servo Saver...
  • Page 15 ASSEMBLY OF THE FRONT PLATE AND STEERING ROD 3x15 Flat Head Screw 3 x 15mm Flat Head Front Steering Rod Screw ( Left ) Front Steering Rod ( Right ) 3x10mm Tapping Screw 3 x 20mm µ · ¤ ú Á ³ ¦...
  • Page 16 ASSEMBLY OF THE FRONT GEAR BOX ONTO CHASSIS 3 x 25mm 3 x 25mm Flat Head Flat Head Tapping Screw Tapping Screw 34040 Chassis * A 3 x 10mm flat head screw are for servo post. 3 x 25mm Flat Head 3 x 10mm Tapping Screw Flat Head...
  • Page 17 ASSEMBLY OF THE CENTER DRIVE SHAFT Center Gear Assembly 34050 Center Drive Shaft (Front) * Insert drive shaft into cap joint. 34040 Chassis 4 x 16mm Flat Head Tapping Screw 4 x 16mm Flat Head Tapping Screw x4 4 x 16mm Flat Head Tapping Screw x4 3 x 25mm...
  • Page 18 ASSEMBLY OF THE STONE GUARD 34080 Nylon Stone Guard (Left-Side) 34080 Nylon Stone Guard (Right-Side) 3 x 10mm Flat Head Screw ( 3 Pcs) 3 x 10mm Flat Head Tapping Screw...
  • Page 19 ASSEMBLY OF THE CLUTCH INTO ENGINE Notes: 3 x 5mm Screw Non-Pull Start Engines... • Alum. Washer behind the flywheel is not needed when using Force engines or similar types. O.S. Engines will require washer spacer. • To check!..place the brass corn against the engine bearing, then flywheel. You should be covering one or two 3 X 8mm thread of the engine shaft.
  • Page 20 INSTALLATION OF THE FUEL TANK AND ENGINE ONTO CHASSIS Note Book Paper 30289 Pressure Nipple 3 x 15mm Screw 30289 30280 Fuel Nipple Fuel Tank *Use note book paper to set 3 x 15mm gear backlash between spur gear Screw and clutch bell gear.
  • Page 21 ASSEMBLY OF THE FUEL TUBE * Connect to fuel tank * Connect to pressure nipple. carburetor. Fuel Tube * Connect to fuel nipple. * Connect to press nipple. ASSEMBLY OF THE RADIO TRAY AND SERVO 3 x 10mm Tapping Screw 3 x 10mm 3 x 10mm Tapping Screw...
  • Page 22 ASSEMBLY OF THE REAR STIFFENER 3 x 10mm Screw 34070 Rear Stiffener 2.6x10 Tapping Screw 2.6x10 Tapping Screw * Use the small strap to secure the servo wire. ASSEMBLY OF THE BRAKE SYSTEM ( Use #30800 brake linkage plastic parts set. ) 2x8mm Screw 2x4mm...
  • Page 23 Assembly of the right and left hand side ASSEMBLY OF THE STONE GUARD are the same. 34080 Nylon Stone Guard (Left-Side) 34080 Nylon Stone Guard (Right-Side) 3 x 10mm Flat Head Screw ( 3 Pcs) 30560 Antenna Tube Antenna Post...
  • Page 24 ASSEMBLY OF THE THROTTLE LINKAGE SYSTEM (Part of 30800 linkage kit) 30530 Throttle Ball Joint * Snap On. 3X3mm Set Screw 3X3mm 30172 Set Screw 2mm Rod Throttle Spring 3X3mm Set Screw 10300 10300 Alum.Stopper Alum.Stopper Plastic Collar * Align throttle servo same as shown.
  • Page 25 ASSEMBLY OF THE FRONT STEERING ROD 30410 6mm Ball End 30402 30411 3 X 30mm Tie Rod Ball & Socket 20mm 30411 Ball & Socket 3x12mm 30410 Screw 6mm Ball End 3x12mm * Align the steering servo as shown. Screw 3x10mm 30660 Tapping...
  • Page 26 ASSEMBLY OF THE FRONT AND REAR SHOCKS Assembly of the right and left hand side ONTO THE SHOCK TOWER are the same. Plastic Washer Use CNC Alum Spacer, 4 purchase. #36507 $4.95 30403 Ball Joint 3 x 8mm Washer Nylon Lock Nut 3 x 15mm Screw...
  • Page 27 ASSEMBLY OF THE FRONT BODY POST 33011 33011 Front Body Post Set Body Post 4x15mm ASSEMBLY OF THE FRONT FOAM BUMPER Tapping Screw (Small Head) 33011 Foam Bumper Cover 34091 Foam Bumper 33011 Body Supporter 31149 Clips 31149 Clips...
  • Page 28 ASSEMBLY OF THE REAR BODY MOUNT 33010 Rear Body Mount Body Post Nylon Nut 2mmNut 2x18mm Screw 3 x 15mm Screw 3 x 15mm Screw 33011 Body Supporter ASSEMBLY OF THE REAR BODY SUPPORT 31149 Clips 31149 Clips * Use this body post for rear.
  • Page 29 ASSEMBLY OF THE TIRES AND WHEELS * The tires might be different as picture shown. 86050 Slick Tires #86044 - Red #86045 - White 86059 * Take off 86059 Inner Sponge #86046 - Lime double side tape. * Use foam cement Inner Sponge (Small) #86047 - Yellow...
  • Page 31 STARTING OF THE ENGINE WITHOUT PULL START How to start the engine: 1. Turn on transmitter and then receiver. 2. Fill fuel tank with fuel bottle. 3. Connect 1.2V glow plug starter. 4. Start engine with 12V starter or starter box ( Note the direction of the starter.) 5.
  • Page 32 PAINTING TIPS For BUGGY Wash the inside of the body with detergent to STEP 1 STEP 2 Tools required are: Curved scissor, hobby knife STEP 3 Use the curved scissors to trim the body to remove any oil and dirt. Dry with lint free towel and a quality masking tape.
  • Page 33 ENGINE BREAK-IN AND TUNNING (BREAK-IN THE ENGINE BEFORE DRIVING THE CAR!) • Choose a wide clear outdoor location with low dirt and dust. • Set the car on box or holder with wheels off the ground. • Turn on radio and car. Make sure throttle is at idle position. OPTIONAL OFNA CAR STANDS •...
  • Page 34 1:1 SCREW SHEET 3 x 5mm Cap Screw 3 x 3mm Set Screw M3 Nut 3 x 5mm Set Screw 3 x 10mm Cap Screw M4 Nut 3 x 8mm Set Screw 3 x 12mm Cap Screw 3 x 10mm Set Screw M3 Nylon Locknut 3 x 15mm Cap Screw 3 x 15mm Set Screw...
  • Page 36 SETTING UP ADJUSTMENT OF THE CHASSIS (REAR) (FRONT) CLEARANCE Use 2mm hex wrench to Use 2mm hex wrench to adjust 4x10mm set screw adjust 4x10mm set screw in rear lower arm. in front lower arm. Place the model car on flat surface. Use 2mm hex wrench to adjustment the chassis to it's minimum clearance.
  • Page 37 OPTION PARTS OF THE 2-SPEED TRANSMISSION 35225 1St Spur Gear 4X4mm 1St Spur Gear (49T.48T .47T) SET SCREW Holder (One-Way) 35227 Clutch Cam Counter - Clockwise One-way 35222 Center Gear Shaft 35227 Clutch Cam 35228 Alum. Nut Counter - Clockwise Nut 2nd Spur Gear (46T.45T .44T) 35229...
  • Page 39 35001 HN-293 2-SPEED KITS, HODR, ULTRA'S, BLAZER, GTP, REV 2 126.95 35002 HN-221 2-SPEED KIT, INFERNO (NOT MP5/ 6) 126.95 35003 HN-221 2-SPEED KIT, INFERNO (NOT MP5/ 6) 126.95 35220 HN-294G GEARS, 2-SPEED SET, 13T/17T REV 2 19.95 35221 HN-220L BASE, CLUTCH BELL, SCREW-ON BASE REV 2 28.95 34110...
  • Page 40 INSTRUCTIONS #35011 1/8 SCALE 2-SPEED TRANSMISSION SET (Shoes Type) * This professional two speed transmission is only for ULTRA GT series and ULTRA GTP series kits. OFNA RACING INSTALLATION SHEETS Clockwise 2nd Spur Gear (46T.45T .44T) #35011 1/8 SCALE 2-SPEED TRANSMISSION SET (Shoes Type) *2nd gear Adjustment Hole.
  • Page 41 ASSEMBLY OF THE 2 SPEED TRANSMISSION INTO CENTER MOUNT (Use the parts that come with your kit.) *Use the ball bearings #30621 that come with your car. 7 x 19x 5mm #30170 Ball bearings #30621 Brake Joint 7 x 19x 5mm Ball bearings 30170 Brake Joint...
  • Page 42 Alum. Nut (Clockwise) No.35220 13T/17T Gear (STD) 35236 2nd Clutch Shoes No.35232 14T/18T Gear Misc Parts Spring No.35233 15T/19T Gear 4mm Ball 35237 6x6mm Set Screw OFNA Racing-USA 3x15mm Hex Screw Tel:949-586 2910 Fax:949-586 8812 Made In Taiwan 35321 8x10x1.5mm Alum. Ring...
  • Page 43 OPTIONAL Rear Pivot Ball Suspension Kit For "ULTRA GTP" #31300 This rear pivot ball kit is suitable for those who already have "ULTRA GTP" car kit. ASSEMBLY OF THE NEW FRONT LOWER ARM Assembly of the right and left hand side are the same.
  • Page 44 Assembly of the right and left hand side ASSEMBLY OF THE REAR HUB are the same. * Use the ball bearings and 36082 Rear rear drive shaft from your car kit. Wheel Shaft *Use the 4mm set screw from your kit. 36053 31304 8x16mm...
  • Page 45 ASSEMBLY OF THE FRONT ANTI-ROLL BAR ( FRONT) 31302 Anti-Roll Bar Adjuster *Turn the anti-roll bar adjuster 31302 keeping both side at the same 3x16mm Anti-Roll angle. Screw Bar Adjuster * Keep the ball of the anti-roll bar central. Turn Turn ( REAR) Changing the angle of the anti-roll bar...

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