I need a brake caliper "piston" for 63 M20C. The parts manual says it is PN 35-202
or could use the entire caliper. These are for use with wheels marked 40-24. I can't find PN on the calipers any longer.
I found my piston is bent, slightly on the thin area where the O ring goes.
Someone must have stepped on it some time in its past. Was trying to find out why pads on that wheel always wear at an angle and now understand why as the piston does not want to move smoothly.