Have a 1997 Honda Foreman 400. Last year while ice fishing on a trip the machine started running badly when driving it. It would start fine and idle, but when you went to take off it would buck and studded. After doing some trouble shooting we saw nothing really apparent but did , somehow stumble on that if the headlights were turned on it runs perfect. Anyone have a clue as to what this may mean? Thx in advance.