I'd hardly call adding laughing gas (and then you'd need a fair sized bottle if you wanted to keep it wound on) or a turbo kit to an RR to push it up to 200mph a simple mod.

There's a big difference between 170 and 200; for one thing I wouldn't fancy the buffetting you'd get sitting on that thing at those speeds. The Hayabusa is built for high speed, hence the streamlining. Once you pass about 150 and get your head under the bubble you really notice this.

Remember, included in that 82lb is an engine that's 30% bigger - so more room for tweaking. I've actually got a video laying around my hard drive of a turbo'd Busa hitting well over 220mph (the rider has a camera strapped to the tank, pointing across the guages and through the screen - the speedo hits the stop pin at 220mph, but the bike's still accelerating hard).

I've had a few bikes (and a few accidents) over the years, but nothing's come close to the Busa for "enthusiastic riding" so far...