I have a wagstaff with the moki 2.10 and a cline regulator, and to say the least it was a nightmare to get it to run correctly. After many many phone calls to people that said they knew how to fix my problems, I finally talked with someone that did know something about it. The trick is to get the engine started and running rich, then adjust the idle mixture while the engine is running at mid-throttle. Don't adjust for a clean smooth idle, adjust for mid-range throttle, and then everything started to work out fine, easy starts, no more dead sticks, and even nice low rpm idles. I credit this engine and cline regulator for breaking my right hand ring finger, while trying to get the darn thing started before I finally got the problem fixed, so be careful. The plane flys really nice now!