I just bought new brake pads for my front disc brakes. The pads are made for my bike. 1985 GS450L. I also replaced the back brakes which are fine. I pushed the piston back in as much as i could. unscrewed the top where you put the brake fluid in so the piston could get back in. I put my new pads on, and the piston is all the way back inside. I can not spin the wheel freely without it stopping right away. And when riding all the brake does is squeal and squeak. Is there a way to loosen these pads anymore?
just jam a wrench in there an yank it open
Probably needs a caliper rebuild. Gunk builds up under the O-ring and squeezes against the piston, preventing the piston from retracting.
Do not ride it like that. You will warp the disc if you haven't already. You need to rebuild the calipers. The pads are exactly big enough to fit in there without dragging. Your calipers are not completely pushed back, causing your brakes to drag. Rebuilding the calipers is easy. You can do it quick enough with a shop manual.
The brake pads are to thick. I asume theyre aftermarket. Take them out and sand them a little on a flat plate.
check the return port in the master cylinder for clogging. When you look into the reservoir you will see 2 holes at the bottom. The smaller is the return port. You may be able to clear it with a bit of copper wire.
