I have a 1991 Honda fourtrax 300 and the rear end tires do not spin under power, only the front ones do. So it's basically front wheel drive right now. Does anyone have any idea on what could cause this to happen? This is my first ATV so I'm not sure where to start. It runs and drives just fine, just the rear wheels don't have any power. It only cost me $360 so I'm wiling to put a little money into it.