MAINTENANCE PROCEDURES
187
Drive Pulley
Drive Pulley Adjustment
WARNING
Remove tether cord cap from engine cut-off switch before
performing any adjustment. Vehicle must be parked in a
safe place, away from the trail.
WARNING
NEVER disassemble or modify the drive pulley.
Improper assembly or modifications could cause the pulley
to explode violently under the stress generated by the high
rotational speed.
See your Ski-Doo dealer to maintain or service the drive
pulley. Improper servicing or maintenance may affect per-
formance and reduce belt life. Always respect mainte-
nance schedules.
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 maximum engine
RPM to maintain maximum power.
Ramp cams should be adjusted so that actual maximum
engine RPM matches the maximum horsepower RPM. Refer
to SPECIFICATIONS (ENGINE).
Note: Use a precision digital tachometer for engine RPM
adjustment.
There are 5 positions in which the ramp cam can be set.
Each position modifies the maximum engine RPM by about
200 RPM.
Lower position numbers decrease engine RPM in steps of 200
RPM and higher position numbers increase it in steps of 200
RPM.
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