I tried to search, but the words stall or stalling bring up every post from install to stalling and most of the posts about stalling have to do with flywheels... Anyhow. I got my new YZ450 today and it's got some jetting issues. I've read mention of these problems before, but I couldn't find any of those posts. The bike is difficult to start and stalls on idle. I was able to get it started, and keep it running with the throttle, and when I decelerate it gives the popping that I've read is from being too lean. The only way I have been able to get it started is to hold the hot start in, which I only knew to try because I'd read it here. I tried to start adjusting the screws on the carb, but it started getting dark on me so I'll have to tinker more tomorrow. The bike is brand new and should have stock jetting. I have to talk to the dealer tomorrow anyway and I'll ask him if they changed the stock settings. Also, does anyone have any tricks to get to the pilot adjustment screw? The only thing I can figure is that you have to take the carb off to adjust it. I think that may be part of the problem I'm having as the TTR125L I also got for my wife needed the pilot screw adjusted to keep it idling too. I was hoping it would be that simple but I know the YZ450 is a much more complicated machine than the TTR is. Anyone have any ideas for me to start with? BTW, that thing kicks some serious butt doesn't it?