Hello, I am having trouble with my dirt bike, it is obviously an 83 Honda XR 500. The problem is in the front brake. One day I was backing it up to go out for a ride, I was pulling it back and there is a bit of a slope behind me so I pull the front brake to stop and it does, only problem is that is won´t come loose now. The lever seems to work fine, I believe the problem is down in the front, at the calliper. My Father and I inspected it, and we thought the problem my lie within the piston. But the master cylinder seems ok. But for now I´ve just been prying apart the pads and going out riding with no front brake. I was just wondering if anyone else had encountered such a problem before?