79 sportster rear brake starts to drag in the heat brakes are fine until its hot out and i ride about 10 miles and stop for a few minutes then they drag and pedal gets hard.

Need a faster answer?
Hi Anonymous, and the usual suspects are:
1. Brake disc badly worn or warped.
2. Insufficient brake pedal freeplay.
3. Brake caliper pistons/bore contaminated or damaged.
4. Master cylinder piston not returning all the way.
5. Brake line inner liner collasped
6. Dot 3 used in a Dot 5 system
Good luck
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