The 81 I've been getting help with here is almost ready for the season. I have one last annoying problem. The front brake calipers rattle pretty badly. Once I touch the brake of course it stops. I have heard o-rings on the top bolt between the fork and caliper. Is this the "fix" or are there other suggestions?

Thanks in advance for any help.

 

some guys put thick foam tape between the caliper and the fork leg it does not fix it but the noise stops

 

I fixed it by installing new bushings in the fork, where the caliper mount bolts go thru.

They are floating calipers. They are supposed to move about. The o-rings and other fixes are frowned upon by some of the more knowledgeable IronHead guys as potentially interfering with caliper operation.