I never said all two strokes are valveless and since everyone has the intelligence to put in a 0.03 second search term they already know that. What is a pissing contest is jumping down my throat for stating once in that entire thread that I said ALL two strokes are valveless, which I did not. I was clearly referring to that individual engine. Unless to you with gearbox vs with is an obvious simple typographical error and the semantic It's referring to THIS engine in THIS thread and not every single two stroke ever made in the history of ever, and that your witch hunt isn't now as equally a pedantic pissing contest as my own, then whatever helps you sleep at night tony.