Re:Great (Score 3, Informative)

Exactly and all for what? 23mph, 80mpg! I had a little motorbike that did 80mpg and 45mph. Why not put the effort into improving a conventional motorbike, it has room for a larger fuel tank and big silencer. Much easier route to tackle the problem. I bet if you developed this model engine mountain bike into something people would buy in volume it would end up looking like a conventional motorbike. Alternatively pedal the damn thing and get fit as well.