Bicycle. motor bike. I think we are already blurring the line aren't we?
My bike has better stopping than my old GSXR and is a lot easier to handle at speed. I can even jump gutters etc. As long as the bike is designed for the speeds you will be expecting to do I see no problem.
I would not use a standard bike frame again, (I cracked the downtube on one already) preferring to manufacture my own from thicker tubing. Good disk brakes and full suspension are needed too.
There seems to be a wall of air I hit at about 60km/h which i'm sure a fairing would help me punch through.