He guys, New kid on the block here. I really appreciate all the tips and help you guys have posted! This is an awesome website! I have the '05 WR450 and love this machine. So far I have removed the baffler on the air box, the snorkle on the stock exhaust. I have ordered the JD kit. Not sure if I will get a can due to noise levels. My question is that I am entering enduros and Hare races this year and need to know, do I really need to pull the grey wire to make my bike run more like a YZ? I will be doing very little track work. Cheers for any help.