the speed is juz theoritical lah.
the figure is tested when the vehicle is stationary.
u imagine hanging on to the wing of a plane going at 640kmh
...
can hit 300 already damn siong for the rider liao.
sum more those are bikes like blackbird or busas or zx12s
sum more that wan on the papers got no windscreed leh.
i think no one can tahan wan lah