Stock 66cc Skyhawk with NT Speed carb, #60 jet with needle clip 1 down from the top, MZMiami exhaust, 36t clamp sprocket, 26X1.75 Continental tires @55psi on a Huffy Big Daddy frame. I am a svelte 210lbs. 40.8mph.
(Just added a new Fred Head and everything went south --- was suggested that the base gasket fubared as it runs like crap even with the stock head back on it. More later.)