Re: How do I get Idle speed down other than idle adjust screw?
Take your air filter assembly off and see where the valve is sitting. It should be able to close completely with the idle adjust screw out.
It is possible your throttle cable is binding somewhere or you have the adjustment barrels turned out too far where it goes into the throttle grip and/or the carb. Make sure those are turned all the way in.
Does the throttle grip move smoothly with tension throughout its whole range?