Yamaha 2004 YXR660 Service Manual page 16

Parking Brake Operation
1 Parking brake arm
2 Parking brake arm shaft
3 Set bolt
When the parking brake is operated, the parking brake cable turns the parking brake arm 1. The
rotation of the parking brake arm is changed to axial thrust in the parking brake arm shaft 2 and the
set bolt 3 is pushed against the adjusting bolt sleeve 4.
When the adjusting bolt sleeve receives the force, the dark shaded area in the above illustration is
pushed together and the brake pad 6 is pushed against the brake disc.
When the brake pad wears, the clearance between the brake caliper piston 5 and the brake pad
becomes larger and the force applied to the brake pad becomes weaker.
If this occurs, the self-adjusting parking brake mechanism adjusts automatically to achieve the
proper clearance.
6 5
1 - 3
FEATURES
2
4
4 Adjusting bolt sleeve
5 Brake caliper piston
6 Brake pad
GEN
INFO
1
3