My buddy has a 2001 Banshee but is an idiot when it comes to computers. Anyways he lost power in his shee and it sounded like it was misfiring kinda. We checked plugs, wiggled wires, still didn't fix it. We let it cool also. Then they wen't to really fixit and it had fixed itself. Then a few months later we were haveing a great day of riding and then all of a sudden he had no power to get up any hills. He barely made it back to the truck. So we checked all and still sputters real bad. No change in gas or mixture, same plugs, TORS removed. What else could it be? Any ideas. (and no its not the rider).