1996 Ski-Doo Shop Manual, Volume 1, Page 157Get this manual
Se ion RAN SM SSI ON Sub-Section 02 (DRIVE PULLEY)
GENERAL
Some drive pulley components (return spring, calibration disk) can be changed to improve vehicle performance in high altitude regionsThe High Attude Technica Data booklet (PN 484062400 and 484054500 for binder) gives information about calibration according to altitudeCAUTIONSuch modifications should only be performed by experience mechanics since they can greatly affect vehicle performanceWARNINGAny drive pulley repairs must be performed by an authorized Bombardier snowmobile dealer, or other such qualified personSubcomponent installation and assembly tolerances requ-ire strict adherence to procedures-detailed