My 09 D8 800 Dragon 163, Full SLP, V-Force3 reeds and a PCV RIPS, Ride around 5500 to 6500 ft. 10-68 weights and always pulls 8150 to 8250 rpms all day, Ran like cra* with the 2010 update and stock programing, I have been a mechanic a long time and talking with others and especially after installing the PCV, the whole problem only is the EPA, Polaris did not use credits for the 09 - 10 products so they have to make there sleds run under the EPA rules now with there fuel maping, There probably 2 years ahead of Cat and Skidoo, I believe you will not see the HP that Cat and Skidoo is making out of the box next year when they run out of credits and have to meet the same guidelines that Polaris has to do now,and all the problems will be with the Cat and the Skidoo, I still love the sled and like I said it rips, Good luck to everyone who wants to switch to another ride now.