It is a Daytona 955i I had a vibration after first track day thought it was brake pads since they were originals had them replaced and while watching shop clean calipers I tried to move the rotor and noticed that one side had movement(floating ) and the other side was fused. Shop did not know; I you tubed it and found out that brake dust road dirt etc gets into bobbins and freezes them up. Bought a bunch of nuts, washers and bolts that fit into hole of bobbin tightened up nut/bolt sprayed in some brake cleaner until bobbin started to spin freely again...vibration gone!