Aerodynamics

[Belzybob]

I cant answer your question but I was of the understanding that the Hayabusa had the lowest drag coefficient of any production bike.
I may be mistaken but I will try to find the info.

I recall reading the same somewhere and some time back. Only a total pisshead would have created the shape purely based based on design aesthetics!

Try sitting up on braking from 280 kmh+ some time - it gives a good indication of aerodynamic effect.