1997 Ski-Doo Factory Shop Manual Volume One, Page 138Get this manual
Section 04 TRANSMISSION Sub-Section 03 (DRIVE PULLEY)
Raise and block the rear of the vehicle and support it with mechanical standWARNINGEnsure that the track is free of particles which could be thrown out while track is rotatingKeep hands, tools, feet and clothing clear of trackEnsure nobody is standing near the vehicleAccelerate the vehicle at low speed (maximum 30 km(20 MPH) and apply the brake, repeat timesRecheck the torque of 90 to 100 Nm (66 to 74 lbfft)WARNINGAfter 10 hours of operation the transmission system of the vehicle must be inspected to ensure the retaining screw is properly torqued;A16D0FA
DRIVE PULLEY ADJUSTMENT
The drive pulley is factory calibrated to transmit maximum engine power at predefined RPMFactors such as ambient temperature, altitude or surface condition may vary this critical engine RPM thus affecting snowmobile efficiencyThis adjustable drive pulley allows setting maximum engine RPM in the vehicle to maintain maximum powerCalibration screws should be adjusted so that actual maximum engine RPM in vehicle matches with the maximum horsepower RPM given in TECHNICAL DATA 09NOTEUse precision digital tachometer for engine RPM adjustmentNOTEThe adjustment has an effect on high RPM onlyTo adjust, modify ramp end position by turning calibration screws