I have a few questions from you pros. I just purchased a WR450F in Calgary Alberta Canada. Now I have been doing some reading just wanted to clarify a few things. I read the Canadian versions dont have the Grey Wire, throttle stop, airbox snorkle and the pipe is sealed up. Did some checking, and I do have the Grey Wire, don't know if it will do anything for me, but I disconected it. Havent checked the throttle stop yet, and I'm not sure if my airbox is different from an american version or not. Can any of you Canadians that own one, verify what should be modified on the Canadian bikes? Also what jet should I be running in the Calgary area, mostly Maclean Creek for specifics. I believe it has a 160 main jet right now. So far I am impressed with the power, but it seems to be lacking in at the top end, seems to sputter at higher revs. Is that normal? I am used to 2 stroke power, so it will take a bit to get used to. Thanks for the help. Any suggestions would be greatly appreciated.