Just bought new 04 WR450. Just finished break in procedure. need the skinny on how to make it fly like like my YZ. I bought the YZ throttle stop screw (not installed yet) Exhaust spark arrester has been removed. I got the lowdown on the Grey wire issue from forum posts. Is there airbox mods such as screen removal or any other restrictive junk in that box or on the pre carb side that needs to be removed or blocked off. should I rejet with provided yamaha jets or do you recommed a JD kit , if so what settings in the JD kit? Bike is general riden from 500 to 2500 elevation. any suggestions, Brothers of Blue?