Well I went out and bought a left-over new 450 and did a little riding today. I had an '07 that I sold last summer and am happy to be getting back on a bike. It ran fine, but it seemed the idle was high. After it got warm it seemed like the idle was high like the hot start was pulled all the time. I checked hot start adjustment and it didn't seem like it was stuck; the cable moved freely. When I got back home I played with the fuel screw a bit, but it seemed to still be idling high. Where is the idle speed adjustment on these things? Could the cool temps be contributing to my problem? Will the Zip Ty FMS01 fit this bike? The Zip Ty site lists up to '08 YZ450s but I don't see the 2009. I thought they were all the same. Am I safe following this article for the setup of this carb? http://www.thumperfaq.com/jetting.htm#PJ Thanks!