After my fatboy runs for a while (while riding on long trips of say an hour) it loses acceleration (the throttle is non-responsive), backfires loudly and dies. I can almost immediately re-start it and continue on for a time until it does it again. Can anyone tell me where to start looking for issues? Has a stage 1kit with 2:1 pipes and an older dynajet (h&n) power commander III (serial port) with a sticker M805-001.MAP on it. Bought it used and the previuos owner bought t used and was totally unfamiliar with the bike. Hope someone can help. Thanks