1999 Ski-Doo Factory Shop Manual Volume One, Page 180Get 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 regionsThe High Altitude Technical Data booklet (PN 484 300 003 and 484 054 500 for binder) gives information about calibration according to altitude
Insert drive pulley puller (PN 529 031 400) then remove drive pulley-
CAUTION
Such modifications should only be performed by experience mechanics since they can greatly affect vehicle performance
WARNING
A05D0KA
Any drive pulley repairs must be performed by an authorized Bombardier snowmobile dealer, or other such qualified personSub-component installation and assembly tolerances require strict adherence to procedures detailed