I have a 05 with the power commander on it from the previous owner. It has the same ECM or ECU and has not been switched by the dealer. I've been told the bike likes to be run like everyone says above 3500, mine, around 4000RPM. I just gear it appropriately to stay there & I'm getting 42mpg both single, and two up. The previous owner told me all of the above info and he had the same problem as you. The power commander worked for this bike. Hope this helps.