During a ride yesterday, my rear brake pads overheated so much that they deteriorated badly and one of the pads was almost down to the backing plate. The 2013 Nine has about 6,000 miles, and I don't use the rear brake as often as the front brake, and never with much force. The bike has never been stored in a damp environment.
I noticed the problem after running on the Interstate for ten miles or so at 70-80 MPH. At the exit, I had no rear brakes; the pedal when all the way down. Eventually after pumping the brake pedal, the pistons were pushed out by the fluid and the brakes returned to working.
I removed the pads and the lining fell off. The pins look good, and the pistons don't look corroded or very dirty, just a little film on them. I was able to push them in with my fingers, so I know they are not stuck.
I bought new pads and will clean the pistons and with change the brake fluid.
Does anyone know what could have caused the brakes to drag enough to burn the pads.