1989 Ski-Doo Repair Manual, Page 250Get this manual
Section 03
TRANSMISSION
(DRIVE BELT)
Sub-section 02
Using spring scale and stick, apply specified force on drive belt halfway between pulleys as shown
AOOO 003008
AOOO 003 006
DEFLECTION ADJUSTMENT
Drive belt deflection is adjusted by moving chaincaseTo do so, loosen the chaincase retaining U-clamp and screw or unscrew tho chaincase adjusting bolt
Or use the belt tension tester (PIN 414 3482 00)