frozen / stuck brake pistons on a motorcycle

dont pop the brake piston out if dont have to. remove the brake pads and push the brake piston back in with a piston pusher tool or a c clamp. pushing the piston in and pumping it out may loosen it. pump slow as brake fluid will be pushed into the reservoir and could squirt out. you should remove brake fluid from the reservoir with a suction device if your going to push the piston in. if you chose to pop the piston , wire wheel it clean and clean out the piston area. put your rubber gloves on , dont want this on your skin