After having to look at the WR450 in the garage with all of those XR's for two weeks I finally got to ride it this weekend. In the last two weeks I disconnected the gray wire, installed the YZ throttle stop screw, pulled the cork out of the exhaust, removed the snorkel, I thought about the JD kit, but for now I put in a 170 main, 50 pilot, and the needle is non adjustable so I have the stock needle. Adjustable fuel screw finished it up. I have to tell you the bike pulls clean and strong, no hesitation, no backfire just clean quick acceleration. I wasn't even in the throttle to much because I'm trying to put some breakin miles on it. Suspention was tight at first but Begin to loosen up as the day wore on. The seat won't cut it for very long, and the tank will be to small for the dez. If anyone knows about a taller seat and tank combo that will work I would love to no about it. I can't believe how quick this bike is I wonder if they forgot the flywheel.