Help. Tried to go riding today and bike wouldn't start. I thought I fouled a plug. OK Put a new one in, bike started right up. Did 2 laps on the track and bike starts missing terribly, not backfiring just misfiring completely. Barely made it off the track under it's own power. In fact stalled for the last time just as I was pulling into the pits. Won't restart. I pull the brand new plug and it's gas fouled really bad. Stick another new one in the cap and check for spark. NOTHING NANDA ZIP ZILCH! How common is it for the coil/plug cap to go bad? It seemed to show up when the bike got hot. I think whatever it was, has been going bad for a while. Last few times I've ridden I noticed a hiccup everytime I'd crack the throttle. It finally died. Any advice?