Hello, I am helping a friend restore an 82' Honda CX500. We're having a problem where, when you push the gear lever up, the lever does not return automatically to the center position, and needs to be manually returned with a gentle push. Otherwise the gearbox works fine. The engine is in the middle of a strip down, and the whole gear selection arrangement appears visibly fine, so we are having trouble diagnosing this problem. Any ideas on how to get the lever to return properly?