1989 Ski-Doo Repair Manual, Page 253Get this manual
Section 03
TRANSMISSION
(DRIVE BELT)
Sub-section 02
TROUBLESHOOTING
1Uneven belt wear on one side onlyWear on one side only
a) Loose engine mountb) Pulley misalignmentc) Rough or scratched pulley surfaces_ d) Driven pulley bushing worn
a) Tighten engine mount nuts equallyb) Align pulleysc) Repair or replace pulley halfd) Replace bushing
ACOO 003 009
2Belt glazed excessively or having baked appearance
Excessive slippage caused bya) Insufficient pressure on belt sidesb) Rusted drive or driven pulley shafts