I just purchased 3 china 110cc atv's w/ automatic trans and one of them won't idle at normal speed it idles to fast. I can't seem to find any way to adjust the idle. can anyone tell me how?

thanks John  

There should be a screw on one side of the Carb that adjusts the idle.  It is usually the one with a small coil spring behind the screw head.  Usually you turn it Clockwise for faster idle and Counter Clockwise for Slower idle.  Hope that helps.