Summary of ultra mbx comp
Page 1
Instruction manual ultra mbx comp rev:01.
Page 2
Required for operation things needed aa batteries ( 12 pcs ) glow fuel 20% tools not included in kit, but needed to maintain your car. Phillips type screw drivers ( l ) phillips type screw drivers ( s ) needle nose pliers cutter 91009 curved scissors $5.95 knife 10239 instant cement cross wrench #17...
Page 3: Failure to Not Read And
Must read this before running running a nitro kit is fun and easy, but to make this a safe rusting. • clean 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...
Page 4
A b c checking engine throttle * insert into transmitter. 1. Insert aa batteries into transmitter (8 pcs). 2.Turn on transmitter. 3.Turn on receiver. 4.Center throttle trims as shown . A b c 1. Pull full throttle. 1. Push trigger to full brake position. 2. Adjust alum. Stopper to increase or decreas...
Page 5
* put the differential gears same as picture shown. 30901 cap joint 30620 x19x6mm ball bearings 30751(fro nt/rear) 30761(center) diff. Case 30779 p5 o-ring 30779 2x12.8 30779 2x12.8 30779 p5 o-ring 30751(front/rear) 30761(center) diff. Case 94034 set screw 30779 0.5x26mm o-ring *apply diff. Gear gre...
Page 6
30911 break cap joint 30620 7x19x6mm ball bearings 30620 7x19x6mm ball bearings 30761(center) 30751(f/r) diff. Case 30779 2x12.8 30769 diff. Gear (large) 30779 2x12.8 30779 p5 o-ring 30761(center) 30751(f/r) diff. Case 94034 set screw 30779 0.5x26mm o-ring o «¬Àô *notice the tapered holes are for th...
Page 7
*notice the tapered holes are for the center diff. Only. 35313 nylon nut 31040 51t spur gear 30111 3x10mm flat head hex screw 30201 center diff. Mount (front) 30201 center diff. Mount (rear) 35313 m3 nylon nut x4 x4 x4 30111 3x10mm flat head hex screw center differential assembly assembly of the spu...
Page 8
94005 3x15mm hex screw 94005 3x15mm screw 36660 brake pad 36661 brake pad linings 36650 brake disk steel 36650 brake disk steel 0.5mm *leave a 0.5mm space between brake disk and brake pad. 30211 plastic bushing 30212 ball bearing 30213 brake cam 30652 center diff. Plate 94004 3x12mm hex screw 30211 ...
Page 9
30121 3x4x4mm chromed tube 30121 3x5mm hex screw 30120 bevel gear (large / metal) *push 3mm tubes into the holes of the diff. Case. 36730 cap joint 94036 5x5mm set screw 30630 6x13x5mm ball bearing 30010 gear box 30630 6x13x5mm ball bearing 30130 bevel gear (small) 34021 front upper arm holder 94010...
Page 10
5x4mm set screw 36055 2.5x16.8mm pin 36054 wheel hub 36053 8x16x5mm ball bearing 36053 8x16x5mm ball bearing x2 x2 36905 plastic washer 36905 plastic washer 5x4mm set screw 2.5x16.8mm pin assembly of the cvd dust cover 10189 cvd dust cover 40105 cvd joint assembly of the right and left hand side are...
Page 11
2.5mm e-ring 2.5mm e-ring 36881 front upper arm x2 30151 4mm arm shaft 3mm e-ring x4 36170 3mm arm shaft x2 2.5mm e-ring x4 3mm e-ring 3mm e-ring assembly of the right and left hand side are the same. 36170 3mm upper arm shaft assembly of the front arms 36881 front lower arm *approx. 3mm *approx. 2....
Page 12
3x8mm screw x2 x2 3x8x0.8mm washer 3x8mm screw 3x8x0.8mm washer 30341 stabilizer ball 30403 6mm ball 40199 stabilizer ball end 40199 stabilizer ball end m3x8mm set screw 3x18mm screw m3x8mm set screw x2 x2 3x18mm screw a b m3x3 set screw x2 m3x3 set screw * cut the plastic as shown. 36905 caster adj...
Page 13
94022 3x18mm flat head hex screw x2 94022 3x18mm flat head hex screw 94029 4x25mm flat head hex screw x2 94029 4x25mm flat head hex screw x2 x2 x1 94027 4x16mm flat head hex screw 94027 4x16mm flat head hex screw 94019 3x10mm flat head hex screw 94019 3x10mm flat head hexscrew set triangle marks in ...
Page 14
36170 4mm arm shaft 34028 rear driver shaft (100mm) 3.0mm e-ring 2.5mm e-ring 2.5mm e-ring 3.0mm e-ring 40102 rear lower arm plastic washer plastic washer 36170 3mm arm shaft 36081 wheel rear hub 36053 8x16x5mm ball bearing 36053 8x16x5mm ball bearing 5x4mm set screw *do not tighten set screw over t...
Page 15
3x18mm flat head hex screw 3x20mm flat head hex screw x4 m3 nylon nut x2 x2 30270 wing stay (left) 30270 wing stay (right) 10290 3mm alum. Washer 10290 3mm alum. Washer x6 m3x18mm flat head hex screw m3x18mm flat head screw m3x20mm flat head hex screw m3x20mm flat head hex screw 30270 wing stay post...
Page 16
X2 3x16mm washer m3x10mm hex screw 30540 front plate 30380 servo saver post 34014 front stiffener m3x16mm hex screw m3 nylon nut 3x10mm hex screw x5 x2 x2 m3x16mm hex screw 36742 servo saver bushing 36750 servo saver connevtor 3mm nylon lock nut 3mm nylon lock nut 6mm e-ring x4 36740 servo saver top...
Page 17
14. 14. 30240 front bumper 4x16mm flat head hex screw 3x25mm flat head hex screw 4x16mm flat head hex screw 4x12mm flat head hex screw 3x10mm flat head hex screw 36100 center drive shaft(front) 4x16mm flat head hex screw 3x25mm flat head hex screw x2 *insert drive shaft into cap joint a a center dif...
Page 18
36100 center drive shaft (rear) 4x16mm flat head hex screw 3x25mm flat head hex screw 4x16mm flat head hex screw 34080 stone guard 34080 stone guide 4x16mm flat head hex screw x4 3x25mm flat head hex screw 3x10mm flat head hex screw x6 3x10mm flat head hex screw 3x10mm flat head hex screw 3x10mm fla...
Page 19
94003 3x10mm hex screw x12 94003 3x10mm hex screw 34025 radio tray 94003 3x10mm hex screw 94003 3x10mm hex screw 94003 3x10mm hex screw 94005 3x16mm hex screw 94005 m3x16mm hex screw x2 steering servo throttle servo 94003 3x10mm hex screw 94004 3x12mm hex screw 94004 3x12mm hex screw 94004 3x12mm he...
Page 20
34070 rear stiffener 30287 alum. Fuel tank post pressure nipple x7 3x10mm flat head hex screw 3x10mm flat head hex screw 3x10mm flat head hex screw 3x10mm hex screw x4 3x10mm hex screw 3x10mm hex screw 3x10mm flat head hex screw 3x12mm hex screw 3x12mm hex screw 3x12mm hex screw x2 40109 fuel tank j...
Page 21
30280 turnbuckle 3x12mm hex screw use the screw provided with your servo. 30481 5x12mm hex screw 10768 servo horn 37370 6mm ball & socket 37370 6mm ball & socket 3x12mm hex screw 10769 servo horn adapter x2 3x12mm hex screw 4x12mm flat head screw x1 4x12mm flat head hex screw 32401 plastic ball end ...
Page 22
10330 7mm tapper corn step1 step2 step 6 step 5 fit the flywheel using a pair of the plier and cross wrench. 10040 3 pin flywheel 10098 sg clutch nut 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...
Page 23
1:1 *connect the air filter connector to the carburetor. 3x8mm hex screw 10017 air filter cap 10017 air filter sponge 10017 air filter mount 10020 air filter connector nylon strap (small) apply filter oil to the sponge before use. Step1 step2 2x4mm hex screw 2x4mm hex screw 2x7mm washer 2x7x0.5mm wa...
Page 24
40090 7mm r-ring 40090 7mm r-ring 40090 2mm washer 40090 2mm washer 40090 1mm washer 40090 1mm washer 40090 3.5mm o-ring 40090 3.5mm o-ring 40090 3.5mm o-ring 40090 3.5mm o-ring 40076(front) shock body 40077(rear) shock body 40059 14.7mm o-ring 49041 spring adjuster 40060 2.5mm nylon nut 40060 2.5mm...
Page 25
3mm nylon nut 40056 plastic bushshing * take the plastic bushing from the shock plastic parts tree. * take the plastic bushing from the shock plastic parts tree. 3x20mm cap screw assembly of the front and rear shock absorber 3mm nylon nut 40056 plastic bushshing 3x20mm cap screw m3 nylon nut x4 x4 3...
Page 26
Assembly of the tires and wheels 86062 x equal pin tires 81095 inner sponge 86034 wheel apply instant glue into the groove of the wheel. 40083 wing 30270 countersunk plastic washer 14150 body clips drill two 7mm holes for mounting. 0 5 10 15 20 25 5 10 15 20 25 check the hole spacing on the undersid...
Page 27: Setting Guide
Setting guide front camber angle setting rear camber angle setting 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 angl...
Page 29
3 x 8mm washer 3mm nylon locknut 3 x 5mm screw 3 x 20mm cap screw * place the clutch shoes with the clutch springs over the 3 pins of the flywheel. Using a screw driver as a lever, bend the small end of the clutch spring behind the clutch nut and press down to snap shoe in place. * fit the flywheel ...
Page 30
Align throttle servo and brake same as shown brake is not on engine at idle ( neutral position ) brake is on brake adjust nut ( braking position ) brake is not on engine at full throttle ( full throttle position ) less brake more brake tighten loose * tighten or loose the adjuster nut will change th...
Page 31: Force 25 Or 26 Pull Start
Ofna racing , 7 vanderbilt, irvine, ca. 92618 • tel:(949)586-2910 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. Carbure...
Page 32
Ofna racing , 7 vanderbilt, irvine, ca. 92618 • tel:(949)586-2910 force 25 or 26 pull start engines #52016 -.25 #52019 -.26 #52018 -.25 #52020 -.26 #52017 -.25 #52021 -.26 (use two per engine.) #52042 -.25 #52045 -.26 #52972 - pin #52990 - clip #52060 #52600 #52074 #52920 - 13mm #52273 #52930 #52090...
Page 33
• trouble shooting guide problem cause solution fuel line not primed fill fuel tank and pressurize tank by capping exhaust engine will not start glow plug will not heat(lite) check glow plug battery heater or replace plug. Engine flooded, too much fuel check carb. Needle setting. Do not over prime. ...
Page 34: Ofna Power Starter System
Ofna power starter system setting up radio check car check 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. Check batteries make sure t...
Page 35: Starting Procedures
Starting procedures glow plug check fuel check place car on car stand or block, this enable free spinning / turning of wheels and prevents run- aways. To start up car. Turn on radio first, and then turn on car. To turn car off shut down engine (cover exhaust with rag, or touch handle of screw driver...
Page 36
Ultra mbx comp rtr parts 10010 shoes, 3 shoe type, carbon black, 3 pcs. 12.95 10011 shoes, 3 shoe type, alum. Cnc blue, lite weight, 3 pcs. 24.95 10012 shoes, 3 shoe type, alum. Cnc purple, med. Weight, 3 pcs. 24.95 10015 oil, foam air filter, 30cc 2.95 10016 foam, replacements, 2 pcs. 5.95 10017 ai...
Page 37
Ultra mbx comp rtr with auto start 30531 throttle spring 2.95 30560 antenna tube protecter and mount 2.95 30620 bearing, 7 x 19mm, 6 pcs. (drive train) 29.95 30630 bearing, 6 x 13mm, 12 pcs. (wheel hubs) 59.95 30631 bearing, 6 x 13mm, 2 pcs. 10.95 30632 sealed bearing, 6 x 13mm, 12 pcs. 66.95 30652 ...
Page 38
36743 6mm e-clip, servo saver, 6 pcs. 2.95 36744 metal posts, servo saver, 2 pcs. 3.95 36750 servo saver connector 6.95 36760 front plate joint 9.95 36850 7mm ball, 6 pcs. 3.95 36880 5x60mm turnbuckles 6.95 36881 front upper & lower mbx arms, 2 pin type, ultra comp 15.95 36901 mbx4 steering knuckles...
Page 40: Owner’S Registration Card
Racer’s name tel:( ) address city state zip dealer’s name tel: ( ) address city state zip ofna racing congratulates you on your purchase of our fine ofna product. With proper maintenance and han- dling this kit will provide many hours of enjoyment. The registration card should be filled out and mail...