ok i was out riding when the bike started to spit and sputter a little bit and then died. i pulled the plug and cleaned it and the bike fired right back up for about 5 minutes then it died again. i went and bought a new plug and the motor still wont fire. i deffinately have good compresson, i know i have fuel, and i know i have spark, no cloggs in the air filter or nothing.oh ya and i disconected the killswitch and still no dice i have not checked resistance of the magneto, or coil yet, but im going to tomorrow. i figured i did not need to check them if i have spark, but i think i might have a weak spark. is that even possible anyone ever had to replace a coil or magneto even though they still had spark? let me know any thoughts. just for your info, this is a boy go fast 80 cc with the centifugal clutch and pull start. it has aproximately 150 miles on it.