Did a search, could not fine any discussions on loose rotor rivets. In the past, I have always given the knock or rap sound cause to the pads being loose in the calipers. (Spring clips). Yesterday, after being concerned about this knock on the Tourer, I did an indept cause search. Discovered that the outer disk rotor is moving back and forth on the inner section, hence the knock when front brakes are applied. 2K Tourer, 23K miles, about a yr ago, lady backed into it, knocked it over from front, twisted forks slightly.
