2005 Ski-Doo Tundra, Skandic, Expedition Shop Manual, Page 362Get this manual
Section 07 TRANSMISSION Subsection 02 (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 experienced mechanics since they can greatly affect vehicle performance
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WARNING
Any drive pulley repairs must be performed by an authorized BRP snowmobile dealerSubcomponent installation and assembly tolerances require strict adherence to procedures detailed