The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: wardan123 on September 26, 2011, 07:47:24 PM

Title: Can I reuse my rotor bolts?
Post by: wardan123 on September 26, 2011, 07:47:24 PM
In the past, certain motorcycles I have owned suggested that new rotor bolts be used with a rotor install. I have just picked up a serviceable used R65 rotor for my front brake- do I need to replacwe the rotor bolts?
Thnks in advance...
Title: Re: Can I reuse my rotor bolts?
Post by: Rob Valdez 79 R65 on September 26, 2011, 08:21:56 PM
I reused mine several years ago.
While I have had "incidents", none were related to disc fastener failure...
Title: Re: Can I reuse my rotor bolts?
Post by: Bob_Roller on September 26, 2011, 08:27:59 PM
Inspect the bolts, if there are no wear grooves in the unthreaded area , reuse them .
Title: Re: Can I reuse my rotor bolts?
Post by: tvrla on September 26, 2011, 10:01:15 PM
I've re-used mine many times without incident. As a matter of fact, I'd never heard of replacing them, so this is a new idea.

BTW, was the original rotor junk? I'd be interested in getting it from you.
Title: Re: Can I reuse my rotor bolts?
Post by: wardan123 on September 28, 2011, 08:35:32 AM
My old one has worn in a very uneven manner. I am looking to change pads, clean the caliper, and install the new rotor.

wirespokes- let me make the swap and I'll be in touch
Title: Re: Can I reuse my rotor bolts?
Post by: Rob Valdez 79 R65 on September 28, 2011, 01:02:38 PM
Quote
My old one has worn in a very uneven manner.  
Like this?

(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.pbase.com%2Ftomfarr%2Fimage%2F75133798%2Fmedium.jpg&hash=a4151407e0ba556ad8303f69231a97d216d0fbbc)

It still worked well, but when an aftermarket came up on sale I replaced it.  The original had about 80,000 miles on it.

When you say "clean the caliper", do you mean open it up and do the job right?

(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.pbase.com%2Ftomfarr%2Fimage%2F75975722%2Fmedium.jpg&hash=59ee6bea3d8234792428b1ab11d8a7e386a78988)

And don't be too disappointed if your pistons are corroded.  A machine shop should be able to turn out a couple for not too much money (stainless steel).  Just take in one of your old ones.

(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.pbase.com%2Ftomfarr%2Fimage%2F94388794%2Fmedium.jpg&hash=2e3494d8dda1aa3aa0987300e918cbf99c2d2843)
Some would say that this corrosion is not so bad that it couldn't be reused - so long as the corroded part doesn't contact the brake piston seal.
At the time, Motobins was selling them (NLA), so I didn't even think about it and replaced with new.
BMW does not offer them.

More images from my rebuild: http://www.pbase.com/tomfarr/r65_brakes