31-08-18, 12:29 PM
Partially seized caliper pistons would be the likely cause. Remove the pads again and gently pump out the pistons without going so far as to pop them completely. You should be able to push them back without using excessive force. If you can’t you may get away with cleaning them and lightly lubricating with red rubber grease, repeating the pump out and push in process.
Failing that it might need the pistons to be removed completely and clean the bores. In my experience of bikes in general it is corrosion behind the dust seal. You may get away with reusing the seals or might need new. Clearly this will mean brake fluid needs to be changed and system bled.
Failing that it might need the pistons to be removed completely and clean the bores. In my experience of bikes in general it is corrosion behind the dust seal. You may get away with reusing the seals or might need new. Clearly this will mean brake fluid needs to be changed and system bled.