1986 Ski-Doo Factory Shop Manual, Page 313Get this manual
Section 03 TRANSMISSION Sub-section 06 (BRAKE)
ADJUSTMENT
Control lever travel
Brake should apply fully while the brake control lever is approx imate Iy 13 mm (112") from the ha ndle ba grip, If adjustment is required, turn the brake cable adjuster counterclockwise until the brake disc can no longer turn then back off the adjuster approximately 112 turnsRecheck brake operation,
Brake Light switch
WARNING: Whenever the brake is readjusted, the brake light switch operation must also be checked and adjusted,