You know what you remind me of? You remind me of an ex who who couldn't convince herself I would dump her sorry ass even though I said I would.
Even after I dumped her sorry ass she still couldn't believe it was real and still insisted I hadn't a clue what I was talking about.
It's OK, you don't have to believe it, but facts are that a good majority of the current active user base on this site have successfully managed to attain at least 45mph with a China girl engine, including myself.
Tell me how a human rider with at most a half horsepower in leg power can achieve 30mph on a bike yet an engine with 3 to 4 times the energy output is simply incapable of moving a bike at speeds that are less than twice the speed of a human powered bike... Math don't add up bud.