1 Place a mirror between the roadwheel and the caliper and check the thickness of the friction material of the disc pads (see illustration). If the material has worn down to the specified minimum or less, the pads must be renewed as an axle set (four pads).

16.1 Checking the front disc pad wear using a mirror

2 For a comprehensive check, the brake pads should be removed and cleaned. This will permit the operation of the caliper to be checked, and the condition of the brake disc itself to be examined on both sides. Refer to Chapter 9 for further information.