Well, I finally got my 04' yzf450 running . What a ride. I absolutely LOVE the power spread this thing has. Anyhoo, I was wondering about the valvetrain noise. It is very noticable when approx 1/4-1/2 throttle. Is this typical on these bikes, or is it cause for concern? I have owned 2 DRZ's, and they didn't seem quite as noisey(the timing chain ran on the same side as the exhaust though, so maybe that masked the sound?) Anyways, I can't wait to go riding again. This thing ROCKS!