Does anybody know why.... - BMW Luxury Touring Community
LinkBack Thread Tools Display Modes
post #1 of 2 Old Jul 31st, 2007, 4:26 pm Thread Starter
Senior Member
alanforn's Avatar
Join Date: May 2005
Location: Crownsville, MD, USA
Posts: 175
Does anybody know why....

Does anyone know why the rear brake disc has so much side to side movement as compared to the front? I've developed a resonant "hum" recently approaching a stop when using the rear. I'm fairly convinced that my source are the guidebolts that secure the disc. Moving them side to side, I can duplicate the tone I'm hearing. Looking at the front floaters, I see they have wave washers on both sides to create a bit of tension. This makes sense to me, allows them to float but takes up freeplay.
It's ironic that it started after the rear drive was rebuilt. I originally thought the disc/pads may have been contaminated with oil, took everything apart and cleaned well to no avail. The only thing different know is I no longer have wheel play as a result of the rebuild. I've read the threads about brake squeals and cow bells, but honestly have never experienced until now--03 w/ 50,000.
alanforn is offline  
Sponsored Links
post #2 of 2 Old Jul 31st, 2007, 5:50 pm
BMW Guru
Ted Shred's Avatar
Join Date: Feb 2003
Location: Nor Cal, , USA
Posts: 8,469
The rotors float. As the bike gets older the washers that hold the disk wear and make some noise. It won't affect brake performance but it is annoying...

2016 R1200GS Adventure
2006 DRZ400E

2007 G650 X Challenge
2006 GT200
2005 R1200GS

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Ted Shred is offline  

Quick Reply

Register Now

In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome