Rear Brake caliper upgrade?

[Guest]

I tried doing a search for this but didn't really find an answer but was curious if anyone knows of a direct bolt on rear caliper? Since mine is seized I figured I'd upgrade.
It's going on my 77 GS750 with wire rim, or can I change both the caliper and bracket out?
Thanks for any advice.

[Rich82GS750TZ]

Rebuilding these calipers is not hard (i just did it for the first time, not a mechanic) and not terribly expensive. I just did the front caliper on my bike. Suzuki piston set should come with the seals, but check to make sure, you may need new axle boots if yours are not pliable or if they are ripped. I replaced all, just because they were 37 yrs old. If everything is original you should consider taking the opportunity to clean and rebuild the rear master cylinder and install a new SS braided brake line: Venhill, Apex, Russell, there are others. Brakes are life (quote from a forum member who gave me the same advice). Rear brakes are not as important as the front but they do have to work.

[cowboyup3371]

Agreed; tear it apart, clean everything in the caliper and the master cylinder (be sure to poke a wire through the very tiny return port), and replace the seals, brake pads, and brake line (with a stainless steel one preferably). Once that is done you'll be golden.

[Big T]

Or, buy a used caliper and rebuild it, which would be simpler.

You can use a newer caliper, but you'd probably need to machine an adapter for the carrier.

The new ones are still single piston, so you wouldn't be gaining anything

[Steve]

The rear brake is, occasionally necessary, but with a proper front brake, it is mostly additional unsprung weight on the rear.

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[Digvid]

Here is my rear brake, as you can see it was pretty bad but the good ole ultrasonic cleaner came through again.
Now since it's so clean I think I'll have it powder coated along with a few other things. 20190228_232936.jpg

[Digvid]

Here it was before. 20190228_131402.jpg

[GS1150Pilot]

The rear brake is, occasionally necessary, but with a proper front brake, it is mostly additional unsprung weight on the rear.

.

This x 100. There is very little benefit to be gained in upgrading a rear caliper. The fronts are a whole other story.

[cowboyup3371]

The insides of the caliper is where all the work needs to be done. Yes it looks pretty on the outside but hopefully you've cleaned all the gunk out of the passages inside

[Digvid]

Yes all the passages are clear, that what's so good about the cleaner it gets to those impossible to reach areas..