1989 Ski-Doo Repair Manual, Page 262Get this manual
Section 03 TRANSMISSION Sub-section 03 (DRIVE PULLEY)
GENERAL
Some drive pulley components (return spring, counterweight, calibration washerl can be changed to improve vehicle performance in high altitude regionsThe "high i'l Ititude technical data booklet" (P 484055200 and 484 0545 00 for binder) gives information about calibration according to altitudeCAUTION: Such modifications should only be performed by experienced mechanics since they can greatly affect vehicle performance
Remove spark plug then bring PTO piston at TDC positionRotate drive pulley 45 clockwise then insert enough starter rope into Cylinder to fill it completelyWARNING: Spring pressure can force assembly apart: thereforeit is imperative that the governor cup be held firmly during governor retaining bolt removalUse drive pulley retainer (P IN 5290052 001(TYPICAL'
WARNING: Drive pulley repairs that include any disassembly or assembly procedures must be performed by an authorized Bombardier dealeror other such qualified personSub-component installation and assembly tolerancerequire strict adherence to procedures detailed