1986 Ski-Doo Factory Shop Manual, Page 248Get this manual
Section 03
TRANSMISSION SUb-section 02 (DRIVE BELT)
Slip slackened belt over the top edge of the sliding half
NOTE: To easily open drfven pulley, 'on Formula MXPlus only, use mm Allen key to screw one of the three Allen screwsSlip the belt over the top edge of the fixed half(TYPICAL I
Slip the belt out from the drive pulley and remove completely from vehicle(TYPICALI
1;002003010
Slip the belt out from the drive pulley and remove It completely from the vehicle
To install the drive belt, reverse the procedure
NOTE: On Skandic only,loosen Allen screw previously tightened to release pressure then, turn clockwise until slight resistance is felt against sliding pulley to obtain an equal pressure on each Allen screwNOTE: The top of the drive belt must be flush with the driven pulley edgeEqually screw or unscrew the three Allen screws to obtain this specific adjustment