Chad, the hard creeping in reverse indicates a problem with your centrifugal clutch, not the change clutch. I would address the centrifugal clutch first and then see if you still have problems. If your idle speed is too high, that would cause the centrifugal clutch to be partially engaged and result in the creeping problem you describe. In that case, slow your idle speed down and re-evaluate. If your idle speed is normal and you still have the problem, I would then just go ahead and replace the centrifugal clutch.