I relyed on this site to help decide which to but and BOY am I glad. I am very satyisfied with my new WR450F! You folks are great ! Heres the scoop... New bike with free mods done. Once off idle it runs awsome. Better than expected for so little done. If the throttle is 'blipped' off of idle under load or not the bike will fall on its face. Roll it just past idle and wack it and its like a rocket. I read pretty much all jetting threads and are pretty sure of what to do for PA at 1000 ft. It sounds like the leak jet needs to be reduced in size but does anyone know what size is installed from the factory? (if it matters the bike was sold new in PA). For that matter, how about all the stock sizes? Main ? Pilot ? Starter ? Leak ? Also, Can someone list the effects a rider might notice if each or any of these is incorrectly sized? Thanks !