Just picked up a new 2009 WR450F yesterday. I had read lots on here about all the power-up mods and I bought the AIS removal kit (even thou I'll leave the AIS on as I'm in CA, mostly wanted all the jets and throttle stop bolt). So I decided to ride it around the driveway stock to see how pathetic it was. To my surprise it ran really well! Wow. Maybe my expectations were so low that they were exceeded, but I kind of liked it. Now I'm a bit worried that all the mods will make it too fast (and I'm an A enduro rider). Anyway, after looking at the carb and deciding that, yup you do need to take the subframe off to be able to even touch it, I decided to just ride it this Saturday as-is and then I'll pull it all apart on Sunday and do all the power-up stuff. But ... I was thinking I could ride this thing with just the throttle stop screw swapped out. Anyone else leave them basically stock? Or does everyone do the normal: - remove smallest inner piece in tail pipe - unplug grey wire - pull all the airbox snorkle stuff off - rejet the carb from the AIS GYTR kit Or some combo of this list? Maybe after my Sat. ride I'll be wondering what I was thinking, but we'll see. I figure I'll do one totally stock ride, then do all the power-up stuff and take it out again and compare. Guess I'm curious if others have done something in the middle. Thanks.