2002 Ski-Doo Shop Manual Volume Three, Page 204Get this manual
Section 05 TRANSMISSION Subsection 03 (DRIVE PULLEY)
GENERAL
Some drive pulley components (return spring, calibration disk) can be changed to improve vehicle performance in high altitude regionsA service bulletin will give information about calibration according to altitudeCAUTION: Such modifications should only be performed by experience mechanics since they can greatly affect vehicle performance
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WARNING
Any drive pulley repairs must be performed by an authorized Bombardier snowmobile dealerSub-component installation and assembly tolerances require strict adherence to procedures detailed