i am really looking to get 55hp or so out of my 450 i am 6'4" and 290lbs. i love my bike but it just seems to be a little bit slower than my '04 was. i dont ride tracks only desert and sand dunes i want to beable to keep up with my buddys on the 500 2 smokers. what is going to be the best mods to do? exhaust, cams, rev box, etc. i dont really want to do a big bore until i need to do a top end the bike is new. i can handle all the power it can produce any input would be greatly appreciated thanks.