1982 Ski-Doo Shop Manual, Page 188Get this manual
SECTION 03 TRANSMISSION
SUB-SECTION 02 (DRIVE BELT)
Straighten the tab lock and unscrew the two nuts on the countershaftSlip the circlip against the adjuster nutSlip circiip
Reinstall circlip and screw the adjuster nut until the brake disk and the brake caliper pivot are aligningThis will provide preliminary pulley alignment
Straighten tab lock
This will allow to open and lock in place the two sliding halves
+-_ Brake caliper