OFNA Racing 2-Speed User Manual
INSTRUCTIONS
* This professional two speed transmission is only for ULTRA GT series and ULTRA GTP series kits.
#35011 1/8 SCALE 2-SPEED TRANSMISSION SET (Shoes Type)
OFNA RACING INSTALLATION SHEETS
#35011 1/8 SCALE 2-SPEED TRANSMISSION SET (Shoes Type)
1st Spur Gear
(49T.48T.47T)
#35228
Alum. Nut
(Counter clockwise)
Counter
Clockwise
# 35225
1st Spur Gear
Holder
(One-Way
bearing installed)
* Push down firmly keeping
the gear straight.
4
9
*NB, this mark is for
the Counter Clockwise nut.
5 X 5mm
Set Screw
#35219
Alum. Nut
(Clockwise)
Clockwise
#35230
8 x 12mm
Flange
Ball earing
35237
M6x6mm
Set Screw
2nd Spur Gear
(46T.45T.44T)
*2nd gear Adjustment
Hole.
#35234
2nd Spur gear
Clutch Bell, rev 3
(Ball bearing Type)
#35230
8 x 12mm
Flange
Ball bearing
* Push bearing into
the gear holder.
* Find a flat surface and use 500 grit
sand paper to ensure the shoes are flat.
* Put the 2 speed carrier
in the "D" cut.
#35235
Clutch Shoe Carrier
#35222
Center Gear
Shaft
* Note: Put the small ring
on the short side.
Short
Not less
than 7mm.
0
Long
5
10 15 20 25
mm
Clutch Shoes after assembly
35236
2ud Gear
Clutch Shoes
35237
3mm
Nylon Nut
35237
M3x15mm
Hex Screw
35237
Spring
35237
4mm Ball
35237
M6x6mm
Set Screw
35237
4mm Ball
Sand Paper
35237
3mm
Nylon Nut
35237
Spring
35237
M3x15mm
Hex Screw
2 SPEED TRANSMISSION AFTER ASSEMBLY.
6
* Important Pre-Setup
* Screw M3x15mm screw in until
spring compresses, do not crush!
Back screw off 5 turns. Shoe
assembly should set into alum.
Clutch holder.
* Tighten Set Screws M6x6mm
slightly to allow pressure from ball
to hold center cam. Do not over
tighten. Adjust both screws for an
even amount of pressure.
Slightly sand!
M3x15
Screw
M6x6
Set Screws
2nd Gear Assembly
1st Gear Assembly
4
9
#35231
8x10x1.5mm
Alum. Ring
49
7
ASSEMBLY OF THE 2 SPEED TRANSMISSION INTO CENTER MOUNT
(Use the parts that come with your kit.)
5 X 5mm
Set Screw
8
Screw
Cement
#30170
Brake Joint
#30200
Center
Diff. Mount
(Rear)
#30621
7 x 19x 5mm
Ball bearings
49
* Large gear to front.
*Use the ball bearings
that come with your car.
#30621
7 x 19x 5mm
Ball bearings
#30200
Center
Diff. Mount
(Front)
9
#33171
Brake Lever
3 x 3mm
Set Screw
Screw
Cement
5 X 5mm
Set Screw
30170
Brake Joint
nt
Screw
Ceme
3 x 10mm
Tapping Screw
#
30220
Center Plate
#30211
Plastic
Pushing
#30210
Brake Cam
Leave 0.5 mm
#30180
Brake Pads
*Use the parts comes
with your kit.
To Front
#30190
Brake Disc
3 x12mm
Screw
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