Don't be misled: the Stormbringer is simply a goofy name for a built Kawasaki ZX-10R. The German tuning shop, Warm Up, has recently customized a ZX-10R and claimed it to be "The World's Fastest Streetbike." That's certainly a far-fetched assertion, but it's a pretty hot ride nonetheless.
A claimed 220 HP under the hood means the bike will definitely boogie, and with custom bodywork and loads of weight savings throughout it should be pretty amusing to ride too. But equally entertaining is the price: $85,000. Ouch.