Help!! Rear brake locks up after a couple of miles

Took the bike out after a 8-9 months of not riding everything went fine till a dumb ass lady in a SUV almost took me out. I dove on the brakes causing the rear to skid a little flipper off the &%(%(%( and got back on the highway. About a mile or so the bike slowly slowed down untillit would'nt move! the rear brake was locked up broke out the honda tool kit and cracked a bleeder on the caliper and out cam steam? smoke? something and brake fluid (have to paint the wheel now) got back home and drained the rear master cylinder and bleed the brakes. today I final got to test ride the bike I went maybe 5 miles and the rear started locking up again bleed the bike at the banjo bolts and took it home.

Anybody have this happen before? I bleed the brakes using tried and true open bleeder push pedal method I started at the banjo bolts up by resovior and worked my way down did the bottom bleeder and then the top I even checked the fronts did I miss something or do I need to rebuild the caliper?

 

I'm curious why you think bleeding the brakes would fix this. I mean, it would hopefully reduce the chance of boiling, but it doesn't fix the problem that caused the heating in the first place.

Sounds like you need to break down the caliper and/or cylinder and clean it out.

 

Do some research on brake fluid, it's properties, and what happens to older fluid and you will understand how this happens. Flushing the system and refilling with fresh fluid would be the first thing to do before you start tearing into perfectly good calipers and master cylinders. The steam was a clue.....

 

Sense you didn't ride for a wile, I think it's just dirt. Take the pads out, clean them with Break Cleaner, also spray the caliper and clean it well too. I think that the pads aren't retracting. You may need to go as far as a caliper kit and replace the puc "O" rings. Start with the simple cleaning first.

RT

 

Yeah, maybe I jumped the gun, based on how I ride. I'd probably never boil my back brake fluid, even if I was running straight water, unless the brakes were binding.

 

check to make sure your not resting your foot on/near the brake lever. since you nearly got creamed, your probly covering the brakes more than before and even light pressure on the lever will cause your brake to lock up over time. just a thought...

 

I checked the fluids first and they were nice and clear just flushed last year before a ride out to Johnson City Tenn the fluid that did spew out was golden I am thinking that the heat caused that. I'll pull the cailiper and check out the pucks where is a good place to get rebuild kit, stealership?

 

Pistons are sticking in the caliper - brake stays on after you use it - everything heats up - brake fluid boils.

I think your rear caliper needs a good coat of servicing :smile:

 

Cleaned up

Sooooooooo pulled the caliper apart everything looked pretty good but the pads they were beat up pretty bad in the center. cleaded everything new pads took it for a ride around the neighborhood without pipe (bitch'n sound) so far so good I go for a longer ride later this week. Now I have to sand and paint the wheels I'm thinking charcol grey