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Thickness and Parallelism

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  1. Raise and support the vehicle (see LIFT AND SUPPORT POINTS ).
  2. Remove the front wheels.
  3. Remove the brake pads (see FRONT BRAKE PAD INSPECTION AND REPLACEMENT  ).
  4. Using a micrometer (A), measure the brake disc thickness at eight points, about 45° apart and 10 mm (0.39 in) in from the outer edge of the brake disc. Replace the brake disc if the smallest measurement is less than the maximum refinishing limit.

    Brake disc thickness: 

    Standard: 28.0 mm (1.102 in) 

    Maximum refinishing limit: 26.0 mm (1.024 in) 

    Brake disc parallelism*: 0.015 mm (0.00059 in) max. 

    *: This is the maximum allowable difference between the thickness measurements.

    Fig 1: Measuring Brake Disc Thickness Using Micrometer
    G06969705Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. If the brake disc is beyond the service limit for parallelism, refinish the brake disc with a Honda-approved commercially available on-car brake lathe.
    NOTE: If the brake disc is beyond the service limit for refinishing, replace it (see FRONT BRAKE DISC REPLACEMENT  ).
  6. Inspect the brake disc runout.
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