Ducati Diavel Workshop Manual page 84

Maintenance operations
Checking brake pad wear and changing brake pads
Warning
Brake fluid is corrosive and will damage paintwork. Avoid contact with eyes and skin. In the case of accidental contact,
wash the affected area thoroughly with plenty of running water.
Important
On handing over the motorcycle after changing the brake pads, inform the customer that the front brake must be used
gently for the first 100 km to allow the pads to bed in completely.
Checking front brake pad wear
Check brake pads wear through the inspection hole in the callipers.
Change both pads if friction material thickness of even just one pad is about 1 mm.
Warning
Friction material wear beyond this limit would lead to metal support contact with the brake disc thus compromising
braking efficiency, disc integrity and rider safety.
Remove the callipers by loosening the retaining screws (1) of the front brake calliper to the fork leg.
Remove the safety cotter pins (2).
Remove the worn pads (3).
Note
Change pads that have a shiny or "vitrified" appearance.
Insert new pads (3) with relevant safety cotter pins (2), push the calliper pistons fully inside their seats by forcing the
pads apart.
Insert the front brake callipers into the discs.
Apply the recommended grease to the retaining screws (2).
Hand tighten the screws to secure the callipers to the fork legs.
Note
Operate the brake lever repeatedly so that the pads are firmly bedded in against the disc by the force of the brake fluid.
Check that the level in the master cylinder tank is not below the MIN mark.
If necessary, top up as follows.
Turn the handlebar so that the reservoir is levelled.
Remove the cover (4) with membrane from the front brake fluid tank (5) by loosening the screws (6).