I heard aviation fuel will melt the reed valves in a 2 stroke dirtbike, something to do with it being made for high altitude. I'm not sure about putting it in a streetrod, might screw up the carburator or something. Reed valves are made out of fiberglass or some carbon fiber, so who knows what it will do to rubber seals. That's just what I heard though, from someone who ran it and had that problem. I haven't really researched it. Maybe someone else knows more about it on the forum.