1999 Ski-Doo Factory Shop Manual Volume Three, Page 172Get this manual
Section 05 TRANSMISSION Subsection 03 (DRIVE PULLEY)
GENERAL
Some drive pulley components (return spring, ramp) can be changed to improve vehicle performance in high altitude regionsThe High Altitude and Sea Level Technical Data Booklet (PN 484 300 003 and 484 054 500 for binder) gives information about calibration according to altitude
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CAUTION
Such modifications should only be performed by experienced mechanics since they can greatly affect vehicle performanceVerify spring specifications before installationDo not only refer to the spring color codeNOTE: TRA drive pulley stands for Total Range Adjustable drive pulleyA20D06A
WARNING
TYPICAL 1Retaining screw 2Insert in any slot