I bought a new motor, but kept my old one. I intend to repair the old one myself and keep it as a back up.

The bearings are very inexpensive, if you can find out the size. Most motor shops want 100.00 or more to install the new bearings. If you go this route, you are better off to go with a new motor. Mine was 184.00 with tax. Probably can find them cheaper on line but by the time you pay freight, they are about the same.