Standard 2 stroke, ABC type, is go to full throttle, adjusted to the rich side but not quite 4 cycling. Do a few heat cycles running like this and you will be good to go. The idea with any ABC type (tapered bore, no ring) is to get it right up to operating temp immediately. Running any cooler is merely wearing it out prematurely because of the pinch at TCD. Forgive me if your engine is a ringed type.