Re: 2 stroke motorized bicycle top speed
the only stock bike i ever built did a whopping 34mph in a full tuck. it wasn't straight out of the box, though. i match ported the intake manifold and the exhaust flange.
the first bike i built i had a 35t sprocket and a stock motor. speed on that was 38mph.
sea level, flat ground. 66cc Grubee GT4