When I purchased my Powerking kit I paid the extra for the upgraded carb. It is a bit larger and has a cable operated choke. This carb has an idle adjustment as well as another adjustment beside it. Does anyone have any documentation on this carb? I would like to tune it a bit but I don't know anything about it. The lean/rich setting on the pin is pretty much the same as the old style. I just would like to know what this other adjustment is for.