Keep an eye on your Fuel Screw. 2 different WR 450's this Weekend started running poorly, hard to start, would not idle,popping out the exhaust e.t.c. In BOTH cases, the culprit was the Fuel Screw-IT WAS GONE-FELL OUT-AWOL.Not just the screw, but the o-ring,spring and washer as well. This seemed rather odd for it to happen to two different riders camped 50 feet apart.Luckily,since this was an AMA National Hare and Hound, Ty Davis was at the race in his Montclair Yamaha Transporter-Semi. He had the parts to replace everything on both bikes- Thanks Ty!-If you are concerned about this happening to you-and you should be-slap a piece of duct tape over the fuel screw hole so if it does back out you won't lose it. Option 2 is an adjustable fuel screw since it's easier to check the setting and change it without a screwdriver. The other plus is that the screw is so long, it cant fall out, it would hit the Starter first.You can guess where I got my adjustable fuel screw.....Ty Davis of course. Oh! and the good part is that my Bike ran killer all weekend-best guess from the finish line board is that I was 6th in class.This is the 2nd race on my WR and I have to say that NOTHING I have ever ridden is as good in the rocks-and there were plenty of them.