Section 06 TRANSMISSION
Subsection 02 (DRIVE PULLEY)
Torque screw to 80 to 100 N•m(59to74lbf•ft).
Install drive belt and guard.
Raise and block the rear of the vehicle and support
it with a mechanical stand.
WARNING
Ensure that the track is free of particles which
could be thrown out while track is rotating.
Keep hands, tools, feet and clothing clear of
track. Ensure nobody is standing near the ve-
hicle.
Accelerate the vehicle at low speed (maximum
30 km/h (20 MPH)) and apply the brake, repeat 5
times.
Retorque screw to 90 to 100 N•m (66 to 74 lbf•ft).
WARNING
After 10 hours of operation the transmission
system of the vehicle must be inspected
to ensure the retaining screw is properly
torqued.
DRIVE PULLEY ADJUSTMENT
The drive pulley is factory calibrated to transmit
maximum engine power at a predefined RPM.
Factors such as ambient temperature, altitude
or surface condition may vary this critical engine
RPM thus affecting snowmobile efficiency.
This adjustable drive pulley allows setting maxi-
mum engine RPM in the vehicle to maintain max-
imum power.
Calibration screws should be adjusted so that ac-
tual maximum engine RPM in vehicle matches the
maximum horsepower RPM given in TECHNICAL
DATA.
NOTE: Use precision digital tachometer for engine
RPM adjustment.
NOTE: The adjustment has an effect on high RPM
only.
To adjust, modify ramp end position by turning cal-
ibration screws.
26,28,29, Calibration Screw, Locking
Nut and Governor Cup
Calibration screw has a notch on top of its head.
A16D0FA
1
1. Notch
Governor cup has 6 positions numbered 2 to 6.
Note that in position 1 there is no stamped number
(due to its location on casting).
See TECHNICAL DATA for original setting.
A16D0GA
1
1. Position 1 (not numbered)
Each number modifies maximum engine RPM by
about 200 RPM.
Lower numbers decrease engine RPM in steps of
200 RPM and higher numbers increase it in steps
of 200 RPM.
Example:
Calibration screw is set at position 3 and is
changed to position 5. So maximum engine RPM
is increased by about 400 RPM.
224 mmr2004-Rev
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