Rear Bake Caliper

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mojack

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I recently rebuilt my warrior from the ground up. I installed the stock rear brakes and found that the rotor heated up and warped because I did not have the chain tensioners adjusted right. So I adjusted everything right and replaced the pads and rotor, now it seems as if the caliper piston wont retract. I started riding and it was just fine then after I used the brake I guess the piston didn't go back in and heated up the entire caliper and rotor to the point where water would sizzle off it. The rotor didn't warp so it is still goo but I thing the caliper is shot. My question is, Is the caliper of the master cylinder to blame? Any advice is appreciated.
 
It sounds like the master cylinder will not allow the fluid to revert back to the reservoir.Did you replace or clean the piston well when you put it back on,also did you clean the sliders that the caliper floats on itself grease etc...
 
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