F650 GS Brake Maintenance FAQ

Compiled & edited by Kristian #562
Please read the Disclaimer before attempting any work in this FAQ.
Last Updated: 21 March 2007, by Winter #1935

For other related FAQs:

Brake Maintenance FAQ
Brake Questions Misc FAQ
See also the Speedo ABS Sensor FAQ as the Sensor is on that little slotted wheel on your (Rear Brake with NO ABS), (Front Brake WITH ABS).
See also the The ABS FAQ

Introduction

GS/Dakar Rear Brake Caliper Recall
Please see the Service Bulletins FAQ for a Recall for 2000/2001 single spark fuel injected GSs and Dakars (see May-2001 bulletin 33-001-01 (013) for details). This recall relates to the rear brake cliper bracket which may bend under extreme circumstances.

CS Rear Brake Caliper Recall
Please see the Service Bulletins FAQ for a Recall for 2000-2002 CSs (see May 2002 bulletin 34-003-02 (022) for details). The recall relates to the threaded fasteners on the rear brake caliper.

There have been several reports of Brake Rotor Bolts coming loose.
There has been seven reports of a rear brake rotor bolt (there are six of them) being sheared off and two others being part-way out and bent at 45° angle. A grinding sound was heard when the bolts hitting parts of the wheel as it rotated. The sheared bolt may have also caused a speedo/ABS sensor problem, there was also damage to the rear wheel. They may also damage the brake disc.
Check your rear brake rotor bolts. If any are loose, dab a bit of Loctite on them, and torque them up. If you remove the bolts, check for Loctite residue on the bolt. If there is no residue, it might be a good idea to remove ALL the bolts, and put Loctite on these bolts. The BMW maintenance manual says you should use Loctite 243 on these bolts.

The hole (circled in red on the image) is for the ABS sensor. If your bike has ABS, you will find a small black sensor and a wire running from that sensor up the fork leg. If you do not have ABS, this hole will be empty.
You should also notice the lack of the slotted ring on the inside of the brake disc (compare the front and rear brake discs).