http://www.jasonfagan.com/files/motorsport/gixxerkart_video.wmv Found this link over on the Triumph message board. 1100cc Suzuki sportbike engine in a go-kart. I'd love to try that thing, it would certainly keep your attention. Power to weight ratio would be incredible (something like 2kg/hp with driver).
I have dialup and do not have six years to wait for the video. This is probably very similar to a cart I saw at the Atwater,CA track last month. The headers went over the top of the drivers head! We watched him take the car for a few laps. It was like strapping a rocket engine to an ant! These types of karts push the insane..Not for me. I'll stay with my 100cc Yamaha! Ps: Art Chambers on the last two track trips was kind enough to allow me to take a few laps in his 125cc shifter. I think that is enough speed in a small machine that pushes your mental limits. Anything bigger is just nuts!
It is about 13 Meg. The kart looks fairly conventional, exhaust exits over right rear wheel. No bodywork. Rocket strapped to an ant would be appropriate analogy. I don't know how fast he is going, my guess would be 100+ toward the end of the video.
This was posted here a while ago. That kart actually has too much power. That engine would be put to much better use in a Formula SAE chassis with wider than FSAE spec tires.