1982 Ski-Doo Shop Manual, Page 185Get this manual
SECTION 03 TRANSMISSION SUB-SECTION 02 (DRIVE BELT)
Lift the countershaft upward approx50 mm (2 in and slip the belt between the shaft and the bearing cage to remove completely -
To install the drive belt, reverse the procedure
_ CAUTION: Once belt is installed, be sure to secure the countershaft bearing by closing the bearing cage and firmly tightening the retaining screw For Elan, Spirit, Futura, Blizzard 5500 MX, Sonic, Blizzard 9500 and Ultra Sonic, to remove belt from pulleys and vehicle: Open the driven pulley by twisting and pushing the sliding halfHold in fully open position-