1980 Ski-Doo Shop Manual, Page 240Get this manual
SECTION 05 SUB-SECTION 03, (DRIVE PULLEY)
WARNING: Drive pulley repairs that include any disassembly or assembly procedures must be per formed by an authorized Bombardier dealer, or other such qualified personSub-component installation and assembly tolerances require strict adherence to procedures detailed
DISASSEMBLYASSEMBLY
Some bolts of the drive pulley having" Loctite" on their threads, it is advisable to use tool such as an impact to break the "Loctite" seal before attempting to unscrew0)Torque to 118 N'm (87 ft-Ibs)00To install or remove "Duralon" bushing from hub plug use suitable pusher and hammer or pressInstall bushing as per illustration
REMOVAL
With engine coldremove spark plugs then bring P.T.O(Power Take Off) piston at T.D.C(Top Dead Center) positionRotate drive pulley 45 clockwise then insert enough starter rope into cylinder to fill it completelyInstall "U" clamp (See Tools Section) over pulley halvesOpen locking tab and remove retaining bolt
_ CAUTION: Be careful when installing sliding halfassembly on square shaft of drive pulley to avoid scratches on "Duralon" bushing caused by square shaft edge