40
8. ENGINE & CLUTCH
Tighten the clutch nut using
HUDY tool #107581
The flywheel collar must stay inside
the flywheel.
If the flywheel collar is too long – if it
is flush with the flywheel or protrudes
slightly – remove a small amount
of material from the end, or use an
XRAY collar.
Hold the flywheel using HUDY
Flywheel Tool #182010
Shim
(for adjusting flywheel distance)
964073
S 7x10x0.2
964074
S 7x10x0.3
964075
S 7x10x0.5
CORRECT
INCORRECT
INITIAL POSITION
for flywheel pins
TECH TIP FOR EXTRA BOTTOM-END POWER
For extra bottom-end power, thread a M3x4 setscrew (#901304) into each clutch flyweight
as shown. The set-screw will add more weight to the end of the flyweight which will cause the
flyweight to open harder, giving more bottom-end power. This is recommended for high-traction
tracks where bottom-end power is required.
After inserting the set-screw,
some excess material may come
out of the hole. REMOVE this
excess material with a knife.
CUTAWAY VIEW
IMPORTANT!
Install set-screw into free (non-pivot)
end of flyweight.
(#901304 NOT INCLUDED)
M3x4
3x
➊
➋
➌
➍
➎
➏
TECH TIP FOR NT1 CLUTCH SHOE
To ensure that the NT1 clutch shoe works properly and for a long time,
it is very important to run in the clutch shoe.
Please follow these run-in steps to help ensure proper clutch operation:
Install clutch according to this Instruction Manual.
Check that the spring preload is not too much; for run-in process use less preload.
When you start the engine, the clutch should start to engage under low RPM.
If the clutch engages only under high RPM, stop the engine and loosen the spring preload
collar. Repeat until the clutch engages under low RPM.
Run in the clutch shoe on the track, or on the starter box if you have only limited time.
(We recommend running it in on the track.)
Run in the clutch shoe for 1 tank of fuel using a soft preload setting, and then after that
slightly tighten the spring preload. DO NOT run in the clutch shoe under high RPM.
Continue this process until the clutch shoe is properly run in; this will be indicated by a dark
and glossy surface colour on the top of the clutch shoe.
DETAIL
10~11mm
9.2 +0.1mm
Adjust with spring
preload collar
Adjust with shims
behind flywheel
DETAIL
DETAIL
DETAIL
Flywheel
CUT
NOTE
ORIENTATION
CLUTCH SPRINGS
#338580 SOFT
OPTION
#338581 MEDIUM
STANDARD
#348541 ULTRA-STABILE
OPTION
#338583 CONICAL WASHER SET OPTION
Clutch weights are machined as 1 piece,
with thin film connecting the pieces
together. You need to cut the connecting
film to separate the 3 shoes.
#338578
CLUTCH SHOE- HIGH-DYNAMIC - RED
XRAY FLYWHEEL COLLAR
#338540
ø6.0mm OPTION
#338541
ø7.0mm OPTION
Use the flywheel collar that comes with your engine, or
use optional XRAY collars.
Summary of Contents for NT 1.2
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