Question about 1982 Yamaha XJ 650

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Rear brakes won't release, increase friction as the disc heats up

I have a 2007 United Motors DST 200 dirtbike, and the rear brakes act strange. They seem fine at first, but as I drive the disc heats up, turning a darkish blue, and the brakes slowly increase friction whether I press the pedal or not, until I can barely get it to move in first gear from a stop. If I let them cool for a while, then it frees up again, until the disc heats up again from friction, I presume. That can't be good for the disc or pads, and is definitely not good for the rider! What can I do to fix it?

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Sounds like you have a piston freezing up i n the caliper or maybe even a faulty hose that has collapsed --take the caliper off, open the bleeder screw and try to press the piston in slowly with very little force--if it will not move in with ease--u have a bad caliper that will need replaced. also check the caliper slides make sure they are free

Posted on Jun 29, 2009

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