I've been experiencing a hot rear brake rotor and caliper. I measured the caliper with an IR gun at one point and got around 250F at the caliper after a ride without using the rear brake at all!

So far I've rebuilt the rear master cylinder and found no problem, rebuilt the rear caliper and found no problem, blew air through the brake line and found no blockages, made sure to grease the guide pins appropriately, verified the pad were properly seated in the spring and seats and am at a loss.

One thing I notice is that the rear caliper brake line puts a bit of twisting pressure on the caliper. I can show this by pushing in the caliper pistons all the way and then having the caliper rest on its pins. You can actually see the caliper twisting as it rest.

It makes sense as when I pulled off the pads, they were worn most on one side of the friction material causing a "slant" on both pads.

One thing I tried doing is bending the banjo bolt more "straight" so that the caliper isn't twisting as much when it sits there. (see the first attached photo.)

The second photo shows when I push the caliper all the way in and letting it sit as it rests. The brake line actually twisted the caliper. With the third photo, I'm just pushing pressure evenly on the caliper on what the face should be when the contact is even.


Anyone else ever experience this before?? Know of any fix/solution?
I understand the rear brake will drag a little inherently, but if its getting hot like ehaust pipes hot, wth??