I buy my carbs from edwards myself as oldtimer suggested.Ill go look and see what i just bought and give ya a number from one of mine.I just bought a half dozen carbs,i know i bought 11mm.
Just checked my stuff.Buy a WT600.It has a nice large triangle shaped throttle lever and a long choke shaft.OR
buy the WT289,this one has an auto choke design as when you clip it on it stays on until the throttle is advanced and then the spring lets go and choke opens.Has a very decent throttle lever.If ya go to my post that says[14ccechox2=28cctwin]or somthing like that the carb WT289,is on that engine running in the video.In this thread.