Front Disc Brake - Loose Rotor Rivets
I've got dual disc brakes on the front of my 1974 R90/6. I took the wheel off this morning in prep for installing a new tire and noticed that the rivets on one of the rotors are slightly loose. Just loose enough to let the rotor move slightly. As additional info, they are the solid rotors.
Anyone had this problem? If so, how did you resolve it?
This is a WAG. It may be possible that fatigue cracks have formed in the hub or disc holes for the rivets. Or in the rivets.This would cause the rivets to lose their clamping force. You would have to remove the rivets so you can remove the rotors and do an inspection.
Whatever the cause, don't ride the bike until you've repaired it. You run the risk of shearing the rivets. You can probably imagine what happens after that.