New member and back to dirt after a long while. I just got a new 2005 WR450F. Right at the dealer I noticed that the bike is running way lean, more than I expected. During my first ride at Hollister OHV park in CA I confirmed that it does run lean although much less so when the bike warms up. At the beginning I had to fiddle with choke and idle screw (?) to prevent the bike from stumbling. I'm looking for suggestions on what to do to fix this. I'm not looking for all-out performance mods as I want to keep the bike mostly stock, at least for now. I looked at this http://www.thumpertalk.com/forum/showthread.php?t=230021 but, frankly, it seems more than I want to do. TIA Alex PS. I did remove the hrottle stop.