1991 FXR, dynatek s ignition and coil. The bike will run fine then suddenly quit running. The starter will turn the engine and the lights work, but it loses fire to the spark plugs. Then it will start again without doing anything to correct the problem. It might run good for an hour or so then do it again, sometimes it will run for only a few minutes. I put a new coil on it but no change. It doesn't matter if the bike is warm or cold, the problem will appear either way. Guessing the ignition inside the nosecone but not sure.