TRW Sound deadening material for motorcycles
Brakes have shims, but sometimes a sound-absorbing foil or anti-squeak foil is used to prevents vibration and noise during braking.
In essence you attach an extra layer between the brake pads and the brake cylinder. Sound dampening film is easily cut to size and is self-adhesive
Sound dampening film prevents irritating noise during braking, but it also changes the way braking feels, while protecting the brake pistons.