Front Disc

FRONT BRAKE DISC THICKNESS CHECK





1. Using a micrometer, measure disc thickness at eight positions, approximately 45° apart and 10 mm (0.39 inch) in from the outer edge of the disc.
Standard value:
24.0 mm (0.94 inch)
30.0 mm (1.18 inch)
Limit:
22.4 mm (0.88 inch)
28.4 mm (1.12 inch)
Thickness variation (At least 8 positions)
The difference between any thickness measurement should not be more than 0.015 mm (0.0006 inch).
2. If the disc is beyond the limits for thickness, remove it and install a new one.
If thickness variation exceeds the specification, replace the disc or turn rotor on the car type brake lathe ("Accuturn-8750" or equivalent). Be sure to follow the exact brake lathe manufacturer instructions.

FRONT BRAKE DISC RUN-OUT CHECK

1. Remove the front brake assembly; and support it with a wire, etc.
2. Inspect the disc surface for grooves, cracks and rust. Clean the disc thoroughly and remove all rust.

3. Place a dial gauge approximately 5 mm (0.2 inch) from the outer circumference of the brake disc, and measure the run-out of the disc.
Limit: 0.05 mm (0.002 inch) or less

NOTE: Secure the disc to the hub with wheel nuts.