Aerodynamics

[Kendo]

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.

I have read the same somewhere,
I also read that part of the design brief was for the rider to fit inside the aerodynanic bubble so to speak, again in an effort to reduce the drag coefficient.

I don't have a wind tunnel, but I do know this. In the rain, at highway speed or better the Busa is the dryest bike I have ever ridden. Once at speed a large percentage of the rain is simply cast over and around the riding position.
My water tunnel theory if you like