Michaux-Perreaux steam velocipede
Not everyone agrees on which machine was the first motorcycle.  Wtiter L. J. K. Setright said the simplest way to say what a motorcycle was was a bicycle with a heat engine. "If we accept this we must go on to admit that its prototype is unidentifiable, shrouded in the mists of industrial antiquity," meaning that this definition meant no one could say for sure which motorcycle was first. Both the Michaux-Perreaux and Roper machines have also been said to be produced in the years  1867, 1868, and 1869.