2. Rotate the disc to examine its condition. Light wear is acceptable, but if it is excessive, the disc must be removed and replaced or reground within the specified limits. To ensure uniform braking, both front or both rear brake discs must be replaced or reground at the same time.
3. Remove the front or rear caliper and suspension as described in Chapter 4 or 11. Do not disconnect the hydraulic hose, but tie the caliper to the coil spring with a wire.
4. Remove the brake pads, then use a micrometer to check the disc thickness in several places (photo). If it is worn to the specified minimum thickness, both front or both rear discs must be replaced or reground together.
5. Loosen the screw and remove the brake disc from the hub.
6. Installation is carried out in the reverse order, but make sure that the mating surfaces of the hub and disc are clean.