My 89 K100 rear wheel was not spinning freely. The tire seemed to bind when rotated. Thought it might be brake pads or a caliper problem. Removed the rear tire, brake pads, and checked the caliper. All seemed to be good. The problem seems to be in the drive shaft. Turning the wheel with the tire off a binding sensation or lack of free turning can be felt. Any thoughts. Is it time to put her down? Every thing on the bike from the clock to the ABS works. Currently has about 87k on it. As always thanks for any suggestions or help. Ken in Katy.