Trouble Shooting Brake Rotor Problems
Description of the defect: The carrier mounting surface can easily distort when the disc positioning bolt is tightened too much. This excessive tightening can cause the mounting surface to break as can be seen in the photo.
Consequences: Run outing cannot be kept within an acceptable tolerance. Heavy vibrations occur during the very first kilometers following installation.
Advice: Tightening bolts only intended to ensure that discs are positioned correctly. Do no tighten them excessively.
Excessive Tightening of the Positioning Bolt
Photos Reproduced From: The Brake Disk Manual by Brembo, author Jean-Paul Pompon and coordinating editor Marc Aguettaz