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

Page 22

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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.

* Tighten 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

#10098

SG Nut & Shim KiT

Engines with ground shafts and few threads
are called SG Shaft. A special clutch nut is needed.

The stock flywheel (#10040) is fine.

ASSEMBLY OF THE CLUTCH INTO ENGINE

#10100

Clutch Spring

#10010

Clutch Shoes
Black Type

* Shoes are
trailing.

3 x 8mm
Washer
Misc. Hardware

#10099

#34110

5x10x4mm
Ball Bearing

#34110

5x10x4mm
Ball Bearing

#10040 (stock)

3 Pin
Flywheel, Taper

#10091

Clutch Nut
screw type

3 x 5mm
Screw

#10330

Brass, Corn (big hole)

#10329

Brass, Corn (sml hole)

3mm
Nylon Lock
Nut

3 x 20mm
Hex Screw

#30480

Engine Mount

#30481

Screws set,
Engine Mount

#30481

Screws set,
Engine Mount

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

SEE NOTES ABOVE

Notes:

Threaded Shaft Engines

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 space #10048 or #10049 shim kit. This requirement old and may not be needed for current engine
production. To check!..place the brass corn #10330 (big hole) 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...
• Force .21 Pull Start Engines required NO additional spacer and no shaft cutting. The Force engines comes with
an alum. cast driver washer, you use this part as the spacer, not the alum. washer shown for O.S. installs

But, you must find the #10329 brass corn (sml hole) for Flywheel. This special corn fits the smaller thread
diameter of the engine shaft. It will center the flywheel when tightening the clutch nut.

3 x 10mm
Tapping Screw

#10016

Air Filter
Sponge
Refills

#10017 - Blue
#10018 - Yellow
#10019 - Rose

#10035 - CNC Alum.
Foam Filter, Blue

Foam Air filters Unit

#10021 - Black
#10027 - Yellow
#10028 - Pink
#10029 - Blue

Air Filter Connector

Nylon Strap
( Small )

ASSEMBLY OF THE AIR FILTER

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!

#10015, Foam
Filter oil, $2.95

1114
3mm Hex Screw
for Engine Mount

40047
Fuel Tank
Post
( Front )

40047
Fuel Tank
Post
( Rear )

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

3x3mm
Set Screw

40050
Muffler Stay
Post

40051
Muffler
Stay

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

Because SG engines are more
common. Some kit include an
SG nut, please look to see if
your has this item. If not you
can purchase one from your
local dealer.

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