Ofna Racing Ultra LX Pro, Instructions Manual

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

Foam Air filters Unit

#10014 - Mount Wire

#10021 - Black

#10027 - Yellow

#10028 - Pink

#10029 - Blue

Air Filter Connector

Nylon Strap

   ( Small )

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 

#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

30481

3 x 20mm

Hex Screw

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

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