RTR Instruction Manual OFNA Racing 22692 Granite Way, Ste. B Laguna Hills, Ca. 92653 (949) 586-2910 Www.ofna.
RTR KITS - REQUIRED FOR OPERATION THINGS NEEDED You will need to buy a few items to start the engine and run the car. • 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. Do NOT use plugs, like the MC-59 or OS-8 In your box you will find.. • #10163 - Bottle, spout top • #10218 - Red “C” size glow heater Glow Fuel 20% AA Batteries ( 12 pcs ) #10212 NiHm Hump Pack, see charger 10214.
MUST READ THIS BEFORE RUNNING Running a nitro kit is fun and easy, but to make this a safe and good experience you must observe a few rules. This kit is extremely fast, easily over 40MPH, and can seriously injure someone if you are not careful. Where to run car? • Any running area you choose must be dry. Do not run car near any water or wet dirt. • Do not run on public streets. It is very easy to have the car run over or damaged by hitting the curb. • Do not operate car in tight confined places.
NON-RTR OR PRO KITS - REQUIRED FOR OPERATION THINGS NEED BESIDES THE KIT 3.5 cc (21 Class) ENGINE REAR EXHAUST OFNA/Picco O-1 bp #51217 Glow Plug Heat with Battery & Charger # 10227....$$19.
PLASTIC PARTS 40017 GEAR BOX PLASTIC PARTS 40003 DIFF. CASE PLASTIC PARTS 40015 ARM HOLDER PLASTIC PARTS 36901 Front Knuckles, Pivot Ball 31304 Rear Hub, Pivot Ball 2 1 40202 Front and Rear Lower Arms.
PLASTIC PARTS 40031 SERVO SAVER PLASTIC PARTS 40047 RECEIVER BOX PLASTIC PARTS 40040 CENTER DIFF.
ASSEMBLY OF THE THROTTLE LINKAGE SYSTEM #30800 Plastic Throttle kit #30530 Plastic Throttle Ball Joint 3X3mm Set Screw * Snap On. 3X3mm Set Screw 2mm Rod Throttle Spring #10300 Alum.Stopper 3X3mm Set Screw Fuel Tube ( 6mm ) #10300 Alum.Stopper * Align throttle servo same as shown. Plastic Collar * Take the plastic collar from brake system plastic parts. Brake Idle Position Note: Battery life is short when using Alkaline batteries.
ASSEMBLY OF THE DIFFERENTIAL GEAR 30779 4 x 10mm 40004 washer Diff. Gear (Small) 4x4mm Set Screw 40006 Cap Joint 30779 4 x 10mm washer 40004 Diff. Gear (Small) 40010 2.5x13.8mm Pin 30773 4mm Cross pin 40003 Diff.
ASSEMBLY OF THE FRONT GEAR BOX 36053 8X16mm Ball bearing OPTION: #49012 PINION GEAR 13TOOTH 40017 Gear Box 36053 8X16mm Ball bearing 40021 14TSmall Bevel Gear 36053 8X16mm Ball bearing....4 40017 Gear Box 40024 13x16x0.2mm Shim..............2 40024 13x16x0.2mm Shim Use shims to adjust gear mesh. 40021 14T Small Bevel Gear..............
ASSEMBLY OF THE FRONT SHOCK TOWER OPT: 49003 CNC 7075 Alum. Shock Tower 35314 4mm Nylon Nut 49037 Front Shock Tower, Orange 40067 M4x15 TP Screw 40067 M3x12 TP Screw ASSEMBLY OF THE FRONT PIVOT BALL KNUCKLE ARM 36901 Ball Type Knuckle Arms ( Right and Left Side) Assembly of the right and left hand side are the same. * Adjust alum. nut to keep steering ball smooth. * Note the "R" mark is for righthand side. * Use 5mm hex wrench. 36903 14mm Steering Ball 36904 14mm Alum.
Assembly of the right and left hand side are the same. ASSEMBLY OF THE FRONT SUSPENSION ARMS 40023 Lower Arm Shaft (4mm) 90021 3mm E-Ring 90021 3mm E-Ring * Insert the drive shaft into the cap joint before assembly. 36170 3mm Arm Shaft 90020 2.5mm E-Ring 90020 2.
ASSEMBLY OF THE REAR GEAR BOX OPTION: #49012 PINION GEAR 13TOOTH 40017 Gear Box 36053 8X16mm Ball bearing 36053 8X16mm Ball bearing 40021 14T Pinion Gear 40017 Gear Box 4X16mm Tapping Screw (Small Head) 40024 13x16x0.2mm Shim * Adjust the backlash with the shims. 4X45mm Flat Head Tapping Screw 90026 5x5mm Set Screw 36053 8X16mm Ball bearing....4 w t re en Sc em C 40015 Rear arm Holder 36730 Cap Joint 40024 13x16x0.2mm Shim..............2 40021 14T Pinion Bevel Gear..............1 40068 Misc.
3x20mm Screw ASSEMBLY OF THE FRONT STABILIZER 40029 Stabilizer Ball End 40029 Stabilizer Ball End 30341 Stabilizer Ball 30701 3x8mm Set Screw 3x20mm Screw 30401 6mm Ball End 30701 3x3 Set Screw 30701 3x3 Set Screw 30341 Stabilizer Ball..........2 40018 Stabilizer Mount Plastic 3x10mm Flat Head Tapping Screw 3 x 20mm Screw ......................2 30701 3 x 3mm Set Screw..............4 40019 Stabilizer 3x10mm Flat Head Tapping Screw 3 x 10mm Flat Head Tapping Screw........
ASSEMBLY OF THE WING STAY ( Take the plastic part from #40027Rear Win Stay Set. ) 40027 Wing Mount 49038 Rear Shock Tower, Orange 40027 Wing Mount 40027 Rear Body Mount 35313 3mm Nylon Nut 3x12mm Tapping Screw 40027 Wing Mount *Insert the 3mm nylon nut before assembly. 3x20 Tapping Screw 40027 Wing Stay Post 40027 Wing Stay ( Right ) 40027 Wing Stay ( Left ) 3x20 Tapping Screw 40027 Wing Mount OPTION: #49043 CNC ALIM. POSTS, WING MOUNT, ORANGE 3 x 12mm Tapping Screw........3 3mm Nylon Nut.....
ASSEMBLY OF THE PIVOT BALL REAR HUB 31304 Pivot Ball rear Hub 36053 8x16mm Ball bearing 36081 Rear Wheel Axle Shaft Assembly of the right and left hand side are the same. * Make sure the pivot ball move smooth. 31305 Spacer Washer 90026 5 x 5mm Set Screw............2 31307 11mm Pivot Ball 36055 2.
ASSEMBLY OF THE REAR ANTI-ROD BAR Assembly of the right and left hand side are the same. 3mm Nylon Nut Rear Upper Arm Assembly 30341 Stabilizer Ball..........2 3 x 20mm Screw ......................2 3 x 25mm Cap Screw 30701 3 x 3mm Set Screw..............2 35313 3mm Nylon Nut 30701 3 x 8mm et Screw..........2. 3 x 20mm Cap Screw 3 x 12mm Tapping Screw..........1 * Insert rear driver shaft before assembly.
ASSEMBLY OF THE REAR GEAR BOX ONTO CHASSIS 40068 4 x 16mm Flat Head Tapping Screw..........4 40064 Chassis 4 x 16mm Flat Head Tapping Screw 4 x 16mm Flat Head Tapping Screw ASSEMBLY OF THE SERVO SAVER 40037 Steering Plate Hex Screw 40037 Steering Plate Hex Screw 4x10mm Screw..........2 4x8mm Plastic flange Bushing 40035 Servo Saver Alum. Axle Tube 35313 M3 Nut..........1 40031 Servo Saver Horn A 40037 Steering Plat Hex Screw.......
ASSEMBLY OF THE SERVO SAVER ONTO THE CHASSIS 4x15mm Tapping Screw 4x10mm Screw 4x10mm Screw..........2 40027 Front Body Post 40095 Front Plat, Orange * Assembly the front body post before assembly the Front Plate. 3 x 12mm Tapping Screw..........1 3x12mm Screw 4 x 15mm Tapping Screw ( Small Head )............2 4 x 10mm Flat Head Screw..........2 OPTION: 49005 -CNC 7075 Alum.
ASSEMBLY OF THE BRAKE AND SPLIT CENTER DIFF. MOUNT * Make brake pads for each side. * Take off the double sided paper before assembly. 36660 Brake Pad 36661 Brake Pad linings 40045 Brake Pad Adjustment Screw 40040 Center Diff. Mount 40044 Brake Pad Spring 40040 Center Diff. Mount 40044 Brake Pad Spring 40044 Brake Pad Spring 40044 Brake Pad Spring 40045 Brake Pad Adjustment Screw OPTION: #49030 CNC 7075 SPLIT CENTER DIFF MOUNT. Assembly the brake disc holder in the direction shown.
ASSEMBLY OF THE CENTER DIFF. INTO CENTER DIFF. MOUNT Center Diff. Assembly 40042 Brake Disk 40042 Brake Disk 40042 Brake Disk 40042 Brake Disk OPTION: #49008 GRAPHITE BRAKE DISKS, 2PCS. 4x10mm Screw..........4 3 x 3mm Set Screw..............2 30171 Brake Lever..........2 3x10mm Screw Scre w Cem ent 40096 Center Diff.
ASSEMBLY OF THE CENTER DIFF. ONTO CHASSIS 40028 Center Drive Shaft (93mm) 40028 Center Drive Shaft (93mm) 4 x 12mm Flat Head Screw..........2 4x12mm Flat Head Screw ASSEMBLY OF THE STIFFENER OPTION: 49015- CNC Alum. Chassis Brace, Front and Rear 4x12mm Flat Head Screw 40018 Center Chassis Brace ( Rear ) 3x25mm Cap Screw 35313 3mm Nylon Nut 40018 Center Chassis Brace ( Front ) 3x12mm Screw 3 x 12mm Tapping Screw........3 35313 3mm Nylon Nut........1 3 X 25mm Cap Screw.........
40078 Yellow, Stone Guard 3x10mm Screw 3x10mm Screw 40078 Yellow, Stone Guard 3 x 10mm Tapping Screw..........6 3x10mm Screw ASSEMBLY OF THE RECEIVER BOX * Use the screw provided with your radio 40047 Receiver Box Cover 2x10mm Tapping Screw 40898 2x25mm Screw 40047 Receiver Box *Use the original battery case or rechargeable hump pack battery. Battery Case, Provided by Radio 10280 Switch Cover 3x10mm Screw Switch, Provided by Radio 40047 Receiver Box 2 x10mm Tapping Screw..........
ASSEMBLY OF THE RADIO TRAY 3x10 Tapping Screw 3x10mm Tapping Screw 3x10 Tapping Screw 3x10mm Tapping Screw 49039 Alum. Radio Tray, Orange Throttle Servo Steering Servo 40027 Radio Tray Post ( Plastic ) 3x12mm Tapping Screw 40027 Radio Tray Post ( Plastic ) 10274 Servo Post OPTION: 49044 CNC ALUM. POST, RADIO TRAY, ORANGE Servo Post * Take the servo post from servo saver plastic part tree. 3 x 10mm Tapping Screw..........14 *Connect as per radio. 3 x 10mm Flat Head Tapping Screw.........
ASSEMBLY OF THE CLUTCH INTO ENGINE Notes: 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. 3 x 5mm Screw • To check!..place the brass corn against the engine bearing, then flywheel. You should be covering one or two thread of the engine shaft. If this is the case, you do not need an additional washer behind the flywheel. 3 X 8mm Washer You must cut the engine shaft if too long.
INSTALLATION OF THE FUEL TANK AND ENGINE ONTO CHASSIS 40066 Pressure Nipple 3X15mm Tapping Screw Note Book Paper 40066 Fuel Nipple 40066 Fuel Tank * Assemble the fuel tank post before assembling the fuel nipple. 3X15mm Tapping Screw * Use note book paper to set gear backlash between spur gear and clutch bell. If the space is not correct the spur gear will be damaged.
ASSEMBLY OF THE FRONT STEERING ROD Nylon Nut * Use the screw provided with your servo. * Enlarge this hole. 3x10mm Screw 30401 6mm Tie Rod End 30690 3x30mm Tie Rod 10768 Servo Horn 30401 6mm Ball 3x15mm Screw 30411 6mm Ball 30411 6mm Tie Rod End Parallel 16mm 0 10 20 30 40 50 * Align the steering servo as shown. mm ASSEMBLY OF THE BRAKE LINKAGE 2x4mm Screw #30800 Brake System Plastic Parts Set * Cut the shaded area as shown.
ASSEMBLY OF THE BRAKE LINKAGE INTO BRAKE ROD 10300 Alum. Stopper 3X3mm Set Screw *Snap On. 5mm Fuel Tube * Align throttle servo same as shown. 5mm Fuel Tube Brake Idle Position Full Throttle USING BREAK ADJUST NUT *use the screw provided With your radio. Tighten Less Brake Loosen Loosen More Brake Tighten * Tighten or loose the adjuster nut will change the brake.
SHOCK ASSEMBLY 49041 Spring Adjuster, Orange 32235 Shock Piston.........4 * Assembly 2 pieces of the shock shaft for front and rear. Oil Seal 40076 Shock Cylinder 40059 14.7mm O-Ring 40060 2.5mm Nylon Nut 32237 3.5mm O-Ring Fit the O-ring into groove. 32235 Shock Piston Make a PAIR for front 40059 14.7mm O-Ring....4 2.6 x 5mm Washer * Short shaft for front. 32237 7mm R-Ring 32237 2mm 32237 Washer 1mm Washer 32237 1mm Washer.............4 32237 2mm Washer..........
ASSEMBLY OF THE FRONT SHOCK ABSORBER Assembly of the right and left hand side are the same. 3x25mm Cap Screw 3 x 20mm Cap Screw..........2 * Take the plastic bushing from the shock plastic parts tree. M3 Nylon Nut..........2 36610 Shock Upper Fixing Plastic Bushing 3 X 25mm Cap Screw..........2 36610 Shock Support.....2 35313 3mm Nylon Nut Assembly of the right and left hand side are the same. 3 x 20mm Cap Screw ASSEMBLY OF THE REAR SHOCK ABSORBER 3x25mm Cap Screw 3 x 20mm Cap Screw..........
Assembly of the right and left hand side are the same. ASSEMBLY OF THE WHEELS ONTO FRONT KNUCKLE ARM AND REAR HUB 15073 Orange Wheel Nut 86044 - Red 86045 - White 86046 - Lime 86047 - Yellow 86048 - Black 86049 - Chrome 17mm Dual Spoke, 2 pairs (8 wheels) per Bag. 15073 Orange Wheel Nut ASSEMBLY OF THE WING 40083 - Wing White 40084 - Wing Yellow 40085 - Wing Red 40086 - Wing Lime 40087 - Wing White * Drill two 7mm holes for mounting.
SET-UP GUIDE RIDE HEIGHT ADJUSTMENT 2mm Hex Screw Use a 2mm hex screw to adjust the ride height. Screwing in the 4x10mm set screw....Ride height becomes lower. Uncsrewing the 4x10mm set screw..Ride height becomes higher. FOR A STICK PACK BATTERY * Use tape to secure the battery. 40048 Stick Pack Battery Holder (5 Cell) Tape Firm Soft 12 3 10211 Stick Pack Battery(5 Cell) ( Not Included.
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. • Fill fuel tank and set master engine needle. • Prime fuel line and Heat glow plug before pull starting engine. • When started, let engine fast idle for two tanks of fuel.
TUNING AFTER BREAK-IN Close master needle by turning clockwise until it stops. Then open needle by turning counterclockwise 3 turns (rich setting). When running car, adjust carb with 1/8 clockwise turns, slowly leaner, until the top speed good. Check engine temp, if possible, for no more 250 degrees. Adjust low end needle for best throttle response. Use only small turns. From idle, give it full throttle, if throttle is slow lean out needle until good.
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