Make sure Ski-Doo flashed the new mapping codes for the ECM on it. I bought a new '06 800 Renegade late last year and found out there was a new jet for the carb (about $30) I had the dealer install it because they had to re-map the ECM and I got one more ride in and what a difference it made. My top end is about $108. Remember the sled is not broke it yet and it's probably running rich. Good luck!!