Smaller rear disk alternatives for stock 89

[Mike Ramos]

RE: Rear brakes & Caliper.

Attempting to improve the performance of the rear brake...

NOTE: an improvement of performance does not mean absolute stopping power; it takes little effort to lock up the rear brake – an improvement in performance in this instance means an improvement in brake feel and the ability to NOT lock up the brake but to actually allow the rider to utilize the limited stopping power of the rear wheel –even under hard braking when weight is transferred to the front.

After warping several rear discs, I went with the Braking brand of disc and the improvement in controllability was noticeable.  This disc is narrower than the stock disc.  

However, what worked best in my situation was to modify the caliper mounting bracket bolts to allow the caliper (while not fully float) to be self-aligning with the disc.  The picture hopefully show the simplicity of the modification.  The disc runs quite a bit cooler and there is a noticeable improvement in braking control.

My initial concern was that the pads would not extend evenly from the caliper, but as the rear bolt is held captive with a wave washer spring, it has not been a problem and the caliper stays centered on the disc.

I know, the caliper is not as clean as it could be & the picture are from a phone but I have been out riding...

Ride safe,

Midget.