1980 Ski-Doo Shop Manual, Page 265Get this manual
SECTION 05 SUB-SECTION 06 (BRAKE)
Remove the following:
air silencer,
INSPECTION:
Measure the thickness of the brake padsIf less than mm (1;") the pad and lever assembly should be replaced
brake retainer nut, then pullout brake assembly, brake light switch, pulley, brake cable (disconnect and remove)Assembly and installation, reverse the procedure0When reinstalling caliper brake ass'y, always align caliper ass'y so that the brake disc is well centered between the brake pads
ADJUSTMENT:
Brake should apply fully while the brake control lever is approximately 13 mm (") from the handlebar gripIf adjustment is required, turn the brake cable adjuster counterclockwise until the brake disc can no longer turn then back off the adjuster approximatelyturnsRecheck brake operation