Assembly of the clutch into engine, Assembly of the air filter, Assembly of the manifold and muffler – OFNA Racing 9.5 MBX RTR User Manual

Page 24

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 using a cross
wrench or deep socket.

If engine turns when tightening,
hold piston with large thick tie-wraps
and hard wood in exhaust port.
Do not use metal, it will
damage engine.

#10098
SG Nut
& Shim KiT

ASSEMBLY OF THE CLUTCH INTO ENGINE

3 x 10mm
Tapping Screw

#10016
Air Filter
Sponge
Refills

#10017 - Blue
#10018 - Yellow
#10019 - Rose
#10034 - Chrome
Foam Air filters Unit

#10013 - Mount Wire

#10021 - Black
#10027 - Yellow
#10028 - Pink
#10029 - Blue
Air Filter Connector

Nylon Strap
( Small )

You must oil foam filter before use.

Filter will not work if not oiled.

Clean with soap and water only.

You will damage foam if washed

if fuel!

ASSEMBLY OF THE AIR FILTER

#10102
Clutch Spring

#10010
Clutch Shoes
Black Type

* Shoes are
trailing.

3 x 8mm
Washer
Misc. Hardware
#10099

#34110
5x10x4mm
Ball Bearing

#10040 (stock)
3 Pin
Flywheel, Taper
#10043
3 Pin
Flywheel, Fan

#10091
Clutch Nut
screw type

3 x 5mm
Screw

#10330
Brass, Corn
(large hole)

#10329
Brass, Corn
(sml hole)

30481
3 x 20mm
Hex Screw

#30480
Engine Mount

#10398 - 12T
#10399 - 13T
#10400 - 14T (stock)
#10401 - 15T
#10402 - 16T
#10403 - 17T
#10404 - 18T
Clutch Bells

SEE NOTES
ABOVE
#10048
OR 10049

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.

• 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.

You must cut the engine shaft if too long. Count 6 threads in front of the flywheel and mark. This is all you need to
tighten the clutch nut and mount the flywheel.

Force Pull Start Engine w/threaded shalf...
• Force Pull Start Engines required NO spacer and no shaft cutting. The engines comes with an alum cast driver
washer, you use this part as the spacer, not the alum. washer shown. Also, use the special flywheel brass corn.
This corn fits the thread shaft diameter so you can tighten the flywheel against the drive hub.

Note

SG Shaft

Threaded

Shaft

Options

Clutch Spring

10100 - Springs, Polished, Med.

10101 - Spring, Gray, Hard

10102 - Spring, Black, Stock

Clutch Shoes, 3 shoe clutch

10010 - Shoes, Carbon Material, Black

10011 - Shoes, Alum. CNC Blue, Lite Weight

10012 - Shoe, Alum. CNC Purple, Med. Weight

Option

10799

Flywheel Wrench

1114
3mm Hex Screw
for Engine Mount

38120
Fuel Tank
Post

* Take the fuel tank post
from J-42 plastic parts tree.

3x3mm
Set Screw

40050
Muffler Mounting
Post

40051
Muffler
Wire

INSTALLATION OF THE FUEL TANK
AND ENGINE ONTO CHASSIS

3X15mm
Tapping Screw

40066
Pressure
Nipple

40066
Fuel Tank

40066
Fuel Nipple

3x10mm
Tapping Screw

ASSEMBLY OF THE MANIFOLD AND
MUFFLER

* Read this page very carefully.

4x10mm
Flat Head
Screw

5x5mm or 4x4mm
Set Screw

* Tighten the strip
and cut off the excess.

* Drill a hole (Size 3.5mm)
in the place and align as shown.
Use a two part epoxy glue to
full seal the nipple base to the nipple.

3x20mm
Cap Screw

Note Book Paper

* 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.

Spur Gear

Clutch Bell

90 Degree

* Loose or tighten 3x20mm cap screw
and 5x10mm hex screw to align
spur gear and clutch bell gear to 90
degree.

* Assemble the fuel tank post
before assembling the fuel
nipple.

#10069
Manifold Adapter
( Red Silicone )

#31991
Manifold, Polished

#10120
Manifold
Spring

#10184
Blue, Silicone
Tube

#10079
Alum. CNC
Pressure Nipple

#31992
Dual Chamber, Polished

Option:

10182

Silicone Tube, Red

10183

Silicone Tube, Yel.

10184

Silicone Tube, Blue