1986 Ski-Doo Factory Shop Manual, Page 252Get this manual
Section 03 TRANSMISSION Sub-section 02 (DRIVE BELT)
TROUBLE SHOOTING
1 Uneven belt wear on one side onlyCAUSE
a) loose engine mount
h) Pulley misalignmentc) Rough or scratched pulley surfaces
Tighten engine mount nuts equallybl Align pulleysc) Repair or replace pulley halfa)
2Belt glazed excessively or having baked appearanceCAUSE
Excessive slippage caused by:
a) Insufficient pressure on belt
a) Check drive pulley tor worn or missing flyweightsfrol1ersb) Clean shaft with steel wool and lubricate with low temperature grease!If applicable)cl Clean pulley surfaces with fine emery cloth and clean clothd) Install correct governor