I just purchased a brand new '06 450 two days ago. I have about 30 minutes of ride time on it. First issue (idling): I was adjusting the idle air screw last night once the bike was warmed up and it was idling for about 20 to 30 seconds with the choke off and then it'd stall. Once I rode it a bit more it refused to idle when put back into neutral. Second issue (stalling): The bike tends to stall when in low rpms and in gear. I have to keep it reving, with or without the clutch in (around tight corners) to keep it running. Is this common? I'm coming from a Banshee, and I'm brand new to the four-stroke world, but from what another response somebody had concerning a related issue, the bike should at least stay running and idle even in gear with the clutch in (without reving), and even when it's out.