Since we're all obsessed with speed, what about your slowest bike??? Mine was a Honda Express that I borrowed from a friend. 50cc, automatic clutch, would NOT do any more than 60km/h, even downhill. Did win a fuel consumption competition for me though. Don't know how it converst to metrics, but I got 113 miles per gallon. It took me 2 and a half hours to use up the contents of its half a gallon fuel tank.