[motoretro]

As long as the brake hardware is clean, adjusted right and lubricated, they will work as intended. Pull the rear drums and inspect things well. Disasembly is easy with a few good tools intended for brake work. Hardware kits(springs, pins,cups,etc) are cheap as is Brakeclean spray. Do one side at a time so you can run over to the other to check things out. If you have one rear wheel locking up, i would suspect weak return springs or possible leaking wheel cylinder. Also you might be surprised that alot of people install the brake shoes backwards....There is a primary and secondary shoe.