I used to have an '05 Hayabusa, and the one odd thing was, for a bike that was designed to go that fast, it was very sensitive to turbulence and crosswinds.
The thing would cruise at 120 to 140 MPH all day long, but pull alongside a semi, and the if it wasn't for the factory installed steering damper, I was sure it would get into a tank slapper.
But my RC51 didn't have those problems.
I'm guessing, the way they sealed the air passageways on the 'Busa over the the less sealed areas on the RC51, made the 'Busa more sensitive to cross-winds and turbulence, the sail effect.
On naked bikes like my FZ1, the air passes through the frame openings and I get more buffeting on my body than from the bike.