I would always replace race with bearing. Fairly easy to do with hammer and long drift. You will see provided cut-outs in rotor on backside of races to give you access for drift. Knock them out and then clean surface well and carefully knock them back in. Some guys use loctite on back of races when reinstalling them. If you use drift to reinstall be very careful it doesn't slip and Mar bearing surface. Can also use a large socket or such for reinstall, just make sure it is perfect size to catch outer lip on race.
