INSTRUCTION MANUAL Ultra MBX Comp Rev:01
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 51009 for auto start. Use plugs without idle bar. Do NOT use plugs, like the MC-59 or OS-8 or any short plug Glow Fuel 20% In your box you will find.. • #10162 - Bottle, 250cc You need to get batteries for the radio transmitter and the car receiver packs. 7.
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.
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 FRONT AND REAR DIFFERENTIAL Step 1 *Builds two differentials for font and rear. 30779 2x12.8 *Notice the straight holes are for the front and rear only. 30769 Diff. Gear (Large) 30779 P5 O-Ring 30620 7x19x6mm Ball bearings 30901 Cap Joint 30773 4x27mm Cross Pin X2 30779 2x12.8mm X2 30751(Fro nt/Rear) 30761(Center) Diff. Case Step 2 30620 x19x6mm Ball bearings 30779 4x10mm Washer 30751(Front/Rear) 30761(Center) Diff.
ASSEMBLY OF THE CENTER DIFFERENTIAL Step 1 30769 Diff. Gear (Large) *Notice the tapered holes are for the center differential only. 30779 2x12.8 30779 P5 O-Ring 30620 7x19x6mm Ball bearings 30773 4x27mm Cross Pin 30779 2x12.8mm 30761(center) 30751(F/R) Diff. Case 30911 Break Cap Joint X2 X2 30620 7x19x6mm Ball bearings Step 2 30779 4x10mm Washer 30779 P5 O-Ring 94034 Set Screw 30779 P5 O-Ring X2 30779 0.5x26mm O-Ring O«¬Àô 30779 2x12.8 94034 Set Screw 30769 Diff.
ASSEMBLY OF THE SPUR GEAR 30111 X4 3x10mm Flat Head Hex Screw 31040 51T Spur Gear *Notice the tapered holes are for the center diff. Only. 35313 M3 Nylon Nut X4 94033 M3x3 Set Screw X4 35313 Nylon Nut 30111 3x10mm Flat Head Hex Screw Center differential assembly * The picture show are center differential after assembly. 30201 Center Diff. Mount (Rear) * Note: the holes for the rear diff. Mount are closer .together 30201 Center Diff.
ASSEMBLY OF THE BRAKE CAM AND CENTER PLATE ASSEMBLY OF THE BRAKE CAM AND BRAKE PADS 94004 3X12mm Hex Screw 30213 Brake Cam 30652 Center Diff. Plate 30211 Plastic Bushing 30212 Ball Bearing 94004 3X12mm Hex Screw 30211 5x8x2.5mm Plastic Bushing 94033 M3x3 Set Screw X4 30211 Plastic Bushing 30212 Ball Bearing X2 94033 M3x3 Set Screw X2 30171 Brake Lever Note: 3mm *Leave 3mm gap between the brake cam and nut. ASSEMBLY OF THE BRAKE PADS 94005 3X15mm Hex Screw X4 94005 3X15mm Hex Screw 0.
ASSEMBLY OF THE FRONT BEVEL GEARS 30120 Bevel Gear (Large / Metal) *Push 3mm tubes into the holes of the diff. Case. 30121 4x3x3mm Chromed Tube X4 30121 3x5mm Hex Screw X4 * Builds two differential for front and rear.
ASSEMBLY OF THE CVD DUST COVER *Made two CVD joint. 10189 CVD Dust Cover 40105 CVD Joint ASSEMBLY OF THE KNUCKLE ARMS 40105 CVD Joint Assembly of the right and left hand side are the same. 36901 Ball type Knuckle Arm(Left) * "L" mark for left side. 36054 Wheel Hub 36055 2.5x16.8mm Pin 36053 8x16x5mm Ball Bearing X2 90026 5x4mm Set Screw 90026 36053 8x16x5mm Ball Bearing 5x4mm Set Screw X2 ASSEMBLY OF THE KNUCKLE ARMS Make steering ball move smooth.
ASSEMBLY OF THE FRONT ARMS 30151 4mm Arm Shaft 36170 3mm Arm Shaft 3mm E-Ring X4 2.5mm E-Ring X4 X2 X2 *Approx. 2.6mm Assembly of the right and left hand side are the same. 36881 Front Upper Arm *Approx. 3mm 36881 Front Lower Arm 90020 2.5mm E-Ring 90021 3mm E-Ring 30151 90020 2.
CLIP IN THE CASTER ADJUSTER * use adjuster to change the caster angle . 36905 Caster Adjuster Caster Adjuster Caster Adjuster Caster Adjuster *Caster angle will become bigger. *Caster angle will become less. Assembly of the right and left hand side are the same. ASSEMBLY OF THE FRONT STABILIZER 94002 3x8mm Screw A X2 34027 Stabilizer 3x8x0.8mm Washer X2 B * Cut the plastic as shown. 94006 3x18mm Screw X2 3x8x0.
ASSEMBLY OF THE REAR GEAR BOX 30130 Bevel Gear (Small) Step 1 5x5mm Set screw 30630 6x13x5mm Ball Bearing 30010 Gear Box 90026 X1 Step 2 * place 5X4 mm set screw in D cut 90026 5x5mm Set screw 30630 6x13x5mm Ball Bearing 36730 Cap Joint ASSEMBLY OF THE REAR SHOCK TOWER 34019 Shock Tower 94022 3x18mm Flat Head Hex Screw 30010 Gear Box Front Cover 94027 4x16mm Flat Head Hex Screw 94029 4x25mm Flat Head Hex Screw 30351 Rear Lower Arm Holder 94022 3x18mm Flat Head Hex Screw X2 94029 4x25mm Flat
ASSEMBLY OF THE REAR UPPER ARM ROD ASSEMBLY OF THE REAR WHEEL HUB * Builds two uppers for left and right hand-side. *Builds two rear wheel hubs for use. 36082 Rear Wheel Axle Shaft 36053 8x16x5mm Ball Bearing 36053 8x16x5mm Ball Bearing 40065 Rear Upper arm Plastic Rod End 36880 Turnbuckle 40065 Rear Upper arm Plastic Rod End 36850 7mm Ball 36054 36055 2.5x16.8mm Pin 90026 5X4mm Set Screw * Anticlockwise mark. 36081 Wheel Rear Hub 36850 7mm Ball 26mm *Do not tighten set screw over tighten.
ASSEMBLY OF THE REAR STABILIZER ASSEMBLY OF THE STABILIZER ROD 94035 3x8mm Screw 3x8x0.8mm Washer x2 x2 94033 M3x3 Set Screw 3x8x0.8mm Washer 94006 3x18mm Washer 40199 Stabilizer Ball End 34028 Stabilizer 94035 M3x8mm Set Screw 94035 3x8mm Screw A B 30341 Stabilizer Ball 30403 6mm Ball 40199 Stabilizer Ball End * Cut the plastic as shown. ASSEMBLY OF THE WING STAY 1. (High Position) 2. (Low Position) 3.
ASSEMBLY OF THE SERVO SAVER 36746 6mm E-Ring 36743 6mm E-Ring 36740 Servo Saver Hom A 36740 Servo Saver Hom A 35313 M3 Nylon Nut 36743 6mm E-Ring x2 36740 Saver Saver Shaft (Brass) 36743 6mm E-Ring 94006 3x16mm Washer X2 36742 Servo Saver Bushing 36740 Plastic Tube 36740 Saver Saver Shaft (Brass) x4 36740 Servo Saver Top Adapter 36740 Servo Saver Horn B 36741 Servo Saver Spring 36741 8x12mm Washer 94006 M3x16mm Hex Screw 36746 6mm E-Ring ASSEMBLY OF THE STEERING TIE-ROD 36850 7mm 35313 3
14. ASSEMBLY OF THE FRONT GEAR BOX ONTO CHASSIS * Insert the front bumper before assembly. 34016 Chassis (Hard-coated) 30240 Front Bumper 94026 4x12mm Flat Head Hex Screw 94019 3x10mm Flat Head Hex Screw 94027 4x16mm Flat Head Hex Screw 94023 3x25mm Flat Head Hex Screw 94023 3x25mm Flat Head Hex Screw 36100 Center Drive Shaft(Front) Center Diff.
ASSEMBLY OF THE REAR BOX ONTO CHASSIS 94023 3x25mm Flat Head Hex Screw X2 *Insert drive shaft into cap joint before assembly.
ASSEMBLY OF THE FRONT SERVO AND RADIO TRAY 34026 Servo Washer 94003 3X10mm Hex Screw 94003 3X10mm Hex Screw 34026 Servo Washer 94003 3X10mm Hex Screw 94003 3X10mm Hex Screw *Put the protection rubber onto your servo.
ASSEMBLY OF THE RADIO TRAY ONTO CHASSIS 94003 3X10mm Hex Screw 94003 3X10mm Hex Screw 34070 Rear Stiffener 94004 3X12mm Hex Screw 94004 3X12mm Hex Screw 94019 3x10mm Flat Head Hex Screw JP-08 Fuel Tank 30287 Alum.
ASSEMBLY OF THE ENGINE ONTO CHASSIS 94026 4x12mm Flat Head Screw X1 94036 5x4mm Set Screw 35313 M4 Nylon Nut X4 94036 5x4mm Set Screw X2 35313 4mm Nylon Nut 30491 Muffler Stay 30481 5X12mm Hex Screw 94026 4x12mm Flat Head Hex Screw ASSEMBLY OF THE FRONT STEERING ROD 94004 3X12mm Hex Screw X2 94004 3X12mm Hex Screw 37370 6mm Ball & Socket 10768 Servo Horn 94004 3X12mm Hex Screw 10769 Servo Horn Adapter 30401 Plastic Ball End 32401 Plastic Ball End 30280 Turnbuckle 37370 6mm Ball & Socket U
ASSEMBLY OF THE CLUTCH Step1 Step2 Place the clutch shoes with the clutch springs over the 3 pins of the flywheel. Using a phillips screw driver or needle nose pliers and bend the small end lf the clutch spring behind the pilot shaft #174D or #180D than press down. Fit the flywheel using a pair of the plIer and cross wrench.
30800 2X8mm Hex Screw ASSEMBLY OF THE THROTTLE LINKAGE Step1 30800 Servo Mount 94033 3x3mm Set Screw 30800 2X25mm Hex Screw Step2 ½L 30800 2X4mm Hex Screw Step3 30172 2X65mm Rod 30800 2X7mm Washer 30800 2mm Tie-Rod End 30800 Adjust Mount 30800 2mm Adjust Mount 30800 2X7x0.
ASSEMBLY OF THE SHOCK Fit the o-ring into groove. 49041 40076(Front) Shock body ( Make 2 for front.) 40060 2.5mm Nylon Nut 40059 Oil Seal 40059 14.7mm O-Ring 40090 3.5mm O-Ring 32235 2.6x5mm Shock Piston Washer 40090 3.5mm O-Ring 40090 1mm Washer 40056 Shock Plastic Rod End * Short shaft for front. 40054 Short Shaft 40090 2mm 40090 Washer 7mm R-Ring 49041 Spring Adjuster 40077(Rear) Shock body ( Make 2 for rear. ) 40060 2.5mm Nylon Nut 40059 Oil Seal 40090 3.5mm O-Ring 40090 3.
ASSEMBLY OF THE FRONT AND REAR SHOCK ABSORBER 30702 3X20mm Screw X4 35313 M3 Nylon Nut X4 40056 Plastic bushshing 35313 3mm Nylon Nut * Take the plastic bushing from the shock plastic parts tree. 30702 3x20mm Cap Screw 40056 Plastic bushshing 35313 3mm Nylon Nut * Take the plastic bushing from the shock plastic parts tree.
ASSEMBLY OF THE WING 25 ASSEMBLY OF THE TIRES AND WHEELS 20 15 10 5 0 5 10 15 20 25 Check the hole spacing on the underside. 30270 Countersunk Plastic Washer 86062 X Equal Pin Tires 81095 Inner sponge 14150 Body Clips 86034 Wheel 40083 Wing Apply instant glue into the groove of the wheel. Drill two 7mm holes for mounting. IN S G TA L N U T E ASSEMBLY OF THE TIRE ONTO FRONT KNUCKLE AND REAR HUB 15072 Blue Wheel Nut 15072 Blue Wheel Nut 15072 Blue Wheel Nut Tire and Wheel assembly.
SETTING GUIDE FRONT CAMBER ANGLE SETTING + Positive - - REAR CAMBER ANGLE SETTING + + Positive Negative - - + Negative Turnbuckle Turnbuckle Place the model car on flat surface. Raise the chassis to it's maximum clearance before the wheels leave the ground. Adjust the length of the front and rear upper arms so that the wheels are right angle to the ground. The camber angle adjustment can be moving the turnbuckle rod on the upper arms, clockwise or anti-clockwise.
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. 10099 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. 10099 3 X 8mm Washer You must cut the engine shaft if too long.
ALIGN THROTTLE SERVO AND BRAKE SAME AS SHOWN ( Neutral Position ) Engine at idle ( Braking Position ) Brake is not on Brake is on Brake Adjust Nut ( Full Throttle Position ) Less Brake More Brake Loose Engine at full throttle Tighten * Tighten or loose the adjuster nut will change the brake.
FORCE 25 OR 26 PULL START ENGINES Thank you for purchasing a OFNA engine. We appreciate your choice and know you will enjoy running it. Please note that the Force information in engine box is subject to change with not notice. Carburetor Low end and barrel stop screws are pre-set by factory.... Do not change until break-in is done. NEW ENGINE BREAK-IN Your OFNA engine is extremely tight when the piston is at the top of the stroke and turning the crankshaft by hand.
#52980 FORCE 25 OR 26 PULL START #52016 -.26 #52019 -.25 ENGINES #52259 MASTER NEEDLE ASSEMBLY #52018 -.25 #52020 -.26 #52017 -.25 #52021 -.26 #52260 #52960 #52250 #52950 #52240 #52220 #52130-P4/P6 #52140 #52181 #52189 #52218, Short #52091 (USE TWO PER ENGINE.) #52042 -.25 #52045 -.26 #52972 - PIN #52990 - CLIP #52060 #52170 #52940 #52600 #52099 #10320 #10330 #52074 #52900 #52920 - 13mm #52273 #52930 FORCE .25/.
• TROUBLE SHOOTING GUIDE PROBLEM CAUSE SOLUTION ENGINE WILL NOT START Fuel line not primed Glow plug will not heat(lite) Engine flooded, too much fuel Fill fuel tank and pressurize tank by capping exhaust Check glow plug battery heater or replace plug. Check carb. needle setting. Do not over prime. Remove glow plug and poor out fuel. Check needle setting for break-in. Check linkage for correct radio neutral. Check for slight barrel gap, 1/6th Check fuel level and prime fuel line/carb.
OFNA POWER STARTER SYSTEM Setting up Read instruction manual carefully. Open and remove kit. Place car on car stand or block, this enables free spinning / turning of wheels. Charge receiver battery, you should trickle charge your batteries overnight. Radio Check Check batteries make sure they are fully charged (batteries are low if light is flashing). Running car on low batteries could cause a run-away car. Set trims(adjustments) on remote to neutral.
Starting Procedures Glow Plug Check Make sure that the glow plug heater wire (white wire) is fastened down properly. If wire is not fastened all the way, there will be no spark, the car will not start. Use one copper washer (shim) on glow plug, the second is a spare. Fuel Check Make sure there is fuel in the tank. Nitro content should be at 20%. Stay with one fuel (brand) as much as possible. If this is the first start up with this kit, fill gas tank half way this will prevent hydro locking.
ULTRA MBX COMP RTR with AUTO START ULTRA MBX COMP RTR PARTS 10010 SHOES, 3 SHOE TYPE, CARBON BLACK, 3 PCS. 10011 SHOES, 3 SHOE TYPE, ALUM. CNC BLUE, LITE WEIGHT, 3 PCS. 10012 SHOES, 3 SHOE TYPE, ALUM. CNC PURPLE, MED. WEIGHT, 3 PCS. 10015 OIL, FOAM AIR FILTER, 30cc 10016 FOAM, REPLACEMENTS, 2 PCS. 10017 AIR FILTER, FOAM, BLUE 10018 AIR FILTER, FOAM, NEON YELLOW 10019 AIR FILTER, FOAM, NEON PINK 10020 1:8 BLK, SILICONE FILTER TUBE, 45 Deg. L SHAPE 10021 1:8 BLK, SILICONE FILTER TUBE, 90 Deg.
ULTRA MBX COMP RTR with AUTO START 30531 30560 30620 30630 30631 30632 30652 30700 30701 30702 30751 30761 30769 30773 30779 30800 30901 30911 31010 31020 31040 31153 31154 31155 31159 31171 31190 31210 31220 31320 31990 32010 32033 32235 34012 34013 34014 34015 34017 34018 34019 34020 34021 34024 34025 34026 34027 34028 34031 34032 34033 34041 34070 34080 34110 35314 36053 36054 36055 36081 36082 36100 36170 36620 36650 36660 36661 36700 36730 36740 36741 36742 THROTTLE SPRING ANTENNA TUBE PROTECTER AND M
ULTRA MBX COMP RTR with AUTO START 36743 36744 36750 36760 36850 36880 36881 36901 36903 36904 36905 37370 38120 38280 40027 40038 40039 40052 40053 40054 40055 40056 40057 40058 40059 40060 40065 40069 40070 40071 40072 40076 40077 40083 40084 40085 40086 40087 40090 40102 40105 40106 40108 40109 40126 40199 86003 86004 86032 86033 86034 86035 86036 86037 86038 86039 90018 90019 90020 90021 90026 90035 6mm E-CLIP, SERVO SAVER, 6 PCS. METAL POSTS, SERVO SAVER, 2 PCS.
OWNER’S REGISTRATION CARD OFNA Racing congratulates you on your purchase of our fine OFNA Product. With proper maintenance and handling this kit will provide many hours of enjoyment. The registration card should be filled out and mailed to OFNA Racing within 10 days of purchase date.
