Officially sold as a "rolling sculpture": The Dodge Tomahawk.

Wiki:

"At the 2003 North American International Auto Show in Detroit, Michigan, Dodge unveiled a vehicle with an unusual design, featuring the 500 hp (373 kW) 8.3 L V10 engine from the Dodge Viper. The vehicle has two front wheels and two rear wheels, making it a kind of motorized quadricycle rather than a typical motorcycle.

In 2005, Dodge decided to sell 10 versions at US$550,000 each through Neiman Marcus. While the Tomahawk is not street legal, it could, theoretically, be ridden. The Tomahawk, as sold, is missing a few trivial parts necessary to make it a running bike.

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Dodge has done some minimal testing on the first bike built, and then COO Wolfgang Bernhardt drove it onto the stage at the Detroit Auto Show. The Tomahawk is officially sold as a "rolling sculpture" to show the Viper engine."

A V10 too much for you? try a half scale replica

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According to the official specs 0-60 mph times have been estimated at .75 seconds, with an estimated top speed of 750+ mph. But there are also reports that the top speed is 676 km/h (about 420 mph). (NOTE: These speed estimations account for wind resistance. They are gearing estimates only. A motorcycles top speed is determined by many variables, including wind resistance, driver's position, and road conditions, including animals that walk out in front of the vehicle.)[citation needed] It is very unlikely that anyone will ever test the vehicle, due to safety concerns and the price of the Tomahawk itself. Dodge has expressed interest in one day taking it to the Bonneville salt flats, but as of yet has not."

A cgi model from tubosquid