1980 Ski-Doo Shop Manual, Page 225Get this manual
SECTION 05 SUB-SECTION 02 (DRIVE BELT)
TENSION ADJUSTMENT
All models except Citation and Mirage
For proper drive belt useSee Technical DataIf drive belt does not have the minimum recommended widthperformance will be affected
Adjust belt tension as follows:
Position reference rule on drive beltUsing wooden