The mod idea has been kicked around KawiForums quite a bit. The conventional wisdom is that if you have a Ninja 650 and want a faster bike, you should just go and buy a faster bike. ZX6 front fork swaps have been done, and would take care of most of my desires as far as suspension and brakes, but that still leaves the engine. It's a 649cc parallel twin, so it's not going to be as smooth as a triple or inline four, ever. Also, that engine doesn't respond very well to big power mods. It's 72 hp from the factory and the most people are getting reliably without a turbo is a bit more than 80. The bikes I'm looking at are in the range of 105-145 horsepower while being roughly similar in weight to the Ninja 650.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.