Ive a 250? Camo 4 wheeler air cooled. First ever problem. Was running great, pulled into my driveway and just shut down. I thought I was out of gas, but have since found I have no spark. The coils both work when I put them on a 150 that I have. Where does the fire come from to fire the coils? My headlights work, as the starter. Just not hitting the plugs. What am I missing? Any help is greatly appriciated. I wasnt sure where to put this post, so please be kind to me! Thanks in advance.