1980 Ski-Doo Shop Manual, Page 253Get this manual
SECTION 05 SUB-SECTION 04 (DRIVEN PULLEY)
REMOVAL
Remove pulley guard and drive beltDetach driven pulley supportRemove exhaust manifold from engineDisconnect transmission rod from gearboxRemove gearbox upper housingRelease chain tension the separate chain at connecting
DISASSEMBLYASSEMBLY
001f necessary heat hub of fixed pulley and outer cam
to facilitate removaL
01n order to measure driven pulley spring tensionthe pulley halves must be separatedTo do thisinsert length