2004 Skidoo Tundra Skandic Series Service Manual, Page 242Get this manual
Section 05 TRANSMISSION Subsection 03 (DRIVE PULLEY)
INSTALLATION
WARNING
Do not apply anti-seize or any lubricant on crankshaft and drive pulley tapers
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 DATANOTE: Use precision digital tachometer for engine RPM adjustmentNOTE: The adjustment has an effect on high RPM onlyTo adjust, modify ramp end position by turning calibration screws
WARNING
Never use any type of impact wrench at drive pulley removal and installationClean mounting surfaces as described in CLEANING above
Drive Pulley Ass'y
The following installation procedure must be strictly adhered toInstall drive pulley on crankshaft extensionInstall new conical spring washer with its concave side towards drive pulley then install screw