I've been using the base chart from the site done by Indy I believe, its been a great help . Maybe Im overlooking the info Im looking for. Are these numbers based upon a stock engine, airbox or exhaust? Something would have been changed to rejet but I dont see what. Ive done the basics with my 06 450, billet insert, grey wire, AIS in the trash and changed out the needle for a JD. Ive been holding off on any alterations to the airbox until I get everything back together (installing a Baja Designs kit also) but as Im working it dawns on me Im not sure where my jetting will be if I start opening the airbox.