So I'm just getting the bike on the road for the summer. Its an 03 M800i.e. in partial throttle, no matter speed with the tach at about 4,000-4,500 it kind of bogs/surges and backfires a little. I can hear the back fire through the airbox (open top). I know its fuel injected, so jetting problems are out i assume. Is there anything else I can check. Besides that the bike runs great, strong power all through the powerband etc. For mods, not much. Remus slip-ons and open top airbox. New gas so thats out.