New to me – 2008 Foreman 500

Hey gang – just picked up a 2008 foreman 500 – great bike. I have a manual shift and when I am shifting out of neutral it jumps a little, what is the proper method to set the idle? I am guessing the idle being a little high can cause this. I also have two screws coming from the carb I am guessing one is the idle which comes out the bottom, the other out the side (both knobs visible when I take the right side cover off)what is the other. I had a shop clean the carb and it had a bit of rough idle when I picked it up so I added some sea foam and have since run a tank of ethanol free gas so it idles smooth just to high I think.