Two types of calipers are used. The following description applies to Figure 2-65. Brakes shown in Figures 2-65 and 2-66 operate in a similar manner.

The front brake master cylinder is an integral part of the brake hand lever assembly on the right handlebar. The rear brake master cylinder is located on right side of motorcycle and is operated by a foot pedal. A hydraulic hose connects the master cylinder to the brake cylinder located in the outer caliper half. Brake pads in the caliper halves apply pressure to each side of disc mounted on the wheel hub.

When the brake lever is operated, the hydraulic fluid forces the piston against the brake pads which contact the disc. The wave spring is compressed between the backing plate (6) and the adjusting ring. The press-fit adjusting ring (7) moves as necessary, to take up excess clearance as friction material wears away. The press-fit adjusting ring takes up a new position in the cylinder and is now located correctly to maintain running clearance when brake is released and makes brake self-adjusting. The action of the wave spring pulls the brake piston away from the disc to create a small pad-to-disc running clearance. Late 1974 and later front calipers do not have a wave spring. Retraction is accomplished by the piston O-ring.

Every 1000 miles, check the rear master cylinder plunger to see that it has 1/16 in. free play.

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