Ofna Racing ULTRA GT LX Manual - page 8
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
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
3 x 10mm
Tapping Screw
#10016
Air Filter
Sponge
Refills
#10017 - Blue
#10018 - Yellow
#10019 - Rose
Foam Air filters
#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
#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
#10041
3 Pin
Flywheel, Hole
#10091
Clutch Nut
screw type
3 x 5mm
Screw
#10329
Brass, Corn
(sml hole)
3mm
Nylon Lock
Nut
3mm
Nylon Lock
Nut
3 x 20mm
Hex Screw
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...
• 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.
ASSEMBLY OF THE TIRES, FOAM INSERTS AND WHEELS
#86044 - Red
#86045 - White
#86046 - Lime
#86047 - Yellow
17mm 5-Star Wheels
#86091
Mini XX- Pin Tire
#15071
17mm Wheel Nuts
#15071
17mm Wheel Nuts
* Apply instant glue into
the groove of the wheel.
WE RECOMMEND CA GLUE
FOR RUBBER TIRES.
IN
ST
AN
T
GL
UE
INST
AN
T
G
LU
E
R R
Front Knuckle Arm
Assembly
Rear Hub Assembly
STARTING OF THE ENGINE WITHOUT PULL START
How to start the engine:
1. Turn on transmitter and then receiver.
2. Fill fuel tank with fuel bottle.
3. Connect 1.2V glow plug starter.
4. Start engine with 12V starter or starter box
( Note the direction of the starter.)
5. After the engine be started, remove the
1.2V glow plug starter.
1.2V
Glow Plug
Starter
* Follow the engine manufacturer instruction manuals
regarding engine set-up, carburetor and maintenance.
Connect with 12V battery
* Note the direction of the
starter.
Rubber wheel turns engine
flywheel.
12V Starter
* To start the engine, use hand held starter
motor or starter box.
#10250
Starter Box
YOUR KIT COMES WITH PRE-GLUED
TIRES, BUT WHEN TIRES ARE WORN
YOU MUST REPLACE THEM. MAKE TIRE
AND WHEEL SET AS SHOWN
Always use tire foam
donut when building tires.
#81091 - Med/soft
#81092 - Med.
Foam
Foam