could design a bike, without having to worry about aesthetics, simply on maximum capability of function, what would it look like, do you think ? Would it look just like a race bike 'cos that's what a race bike is supposed to be ? or would it look more like the butt-ugly 'Busa (accomplished and fast, I know, but still fell out of the ugly tree, hit every ugly branch on the way down, fell into an ugly hole and got covered with ugly dung). No offence intended. Hee hee. I know it would depend on what function you wanted the thing to perform, but lets say we are talking sports bikes........
Old and slow and almost certainly with carbon monoxide poisoning from your exhaust !