1980 Ski-Doo Shop Manual, Page 245Get this manual
SECTION 05 SUB-SECTION 03, (DRIVE PULLEY)
Install governor cup making sure that the shaft end rests
in govenor cup seatingPosition retaining bolt with new
locking tab then torque to 85 Nom (63 ft-Ibs)CAUTION: Incorrect seating of shaft end in governor cup can cause crankshaft bendingWhen pulley is completely assembled always measure distance of both pulley halves to make sure that the pulley is properly installedDistance must be 76 mm (3")_