Suzuki AN650 2002 Service Manual page 361

CHASSIS 9-89
OPERATION (Brake pads are worn➔ ➔ ➔ ➔ Braking➔ ➔ ➔ ➔ Automatic adjuster operate)
If braking when the brake pad being worn, the caliper piston/adjust-nut move [ 1] untill the clearance
depended on abrasion is done away.
The axial movement [ 2] is converted to rotary movement and acts on the adjust-bolt and adjust-nut. Only
the adjust-bolt turns [ 3] because the caliper piston/adjust-nut is fixed to the brake pad with caliper piston
groove and pad boss at A. Thus, the adjust-bolt keeps original position with rotating as well as the caliper
piston/adjust-nut moves outside.
The adjust-bolt stops rotating once the brake pad-to-disc clearance become zero, so the automatic adjuster
operation is completed.