I went down to local small motor shop and asked to see one of their walbro carbs and noticed it only had 1 hole on the side of the butterfly valve. So i soldered the center one shut on my zama. I think it idles roughly the same maybe 100-200 rpm lower. I don't have a tach to check yet.

No idle set screw that has already been removed. I can kill the motor with throttle or the battery switch for the electronic ignition.

I'll play with the low end adjustment on the carb some more, but other than that I think I'm just gonna have to learn to live with it. Maybe put a leash on it and walk it from the pits to the runway...