I have been getting a squeaking from the back brakes for a while now. I would only get it when bike was sitting for a while. It would go away after a ride. It seens now I have no foot brake. I checked pads and there are grate. I am getting a very small bit of compression on the piston, but no stopping power… Fueled is toped up. I bleed the brakes to see if air got in but still foot brake leave is soft. Any one???