Fastest bike in the world(680 km/h)

The Dodge Tomahawk is a non-street vehicle introduced in 2003 by Dodge, initially as a one-off concept, and then later that year as a limited production vehicle when DaimlerChrysler announced they would sell hand-built reproductions on order. The Tomahawk attracted significant press and industry attention for its striking design, its outsize displacement, its 10-cylinder car engine, and its four close-coupled wheels, which give it a motorcycle-like appearance.The retro-Art Deco design's central visual element is the 500-horsepower (370 kW), 8.3-litre (510 cu in) V10 SRT10 engine from the Dodge Viper sports car. The Tomahawk's two front and two rear wheels are sprung independently, which would allow it to lean into corners and countersteer like a motorcycle. It has a 3.35 US gal (12.7 L; 2.79 imp gal) fuel tank.

 The Tomahawk was sold through the Neiman Marcus catalog for US$555,000. As they were not street legal, Dodge said the reproductions were "automotive sculpture", "intended for display only" and not fully operational.

Bennett's team at RM custom-milled the Tomahawk components from blocks of aluminum. Under the seat are two alloy pieces that began as 340 kg billets that are machined down to 11 kg each, and polished to a mirror finish. Details like hand levers and the twistgrip use needle and ball bearings.

As introduced in 2003, the one-of-a-kind Tomahawk was operational and road-ready, but not fully road-tested, and acceleration and top speed were not confirmed; Dodge described the vehicle both as "automotive sculpture", intended for display only, while also saying it was "rideable".

Speed

Dodge press releases and spokespeople gave various hypothetical top speeds ranging from 300 mph (480 km/h) to as high as 420 mph (680 km/h), which analysts thought were probably calculated with horsepower and final drive ratio alone, without accounting for drag, rolling resistance, and stability. These estimates, and the more conservative 250 mph (400 km/h) a designer suggested could be possible, were debunked as implausible, or physically impossible, by the motorcycling and automotive media. No independent road tests of the Tomahawk have ever been published, and the company said that in internal testing it was never ridden above 100 mph (160 km/h).

The January 6, 2003, press release from Dodge announcing the Tomahawk and listing the specifications said it had "a potential top speed of nearly 400 miles per hour" and also said "Performance: 0–60 mph: 2.5 seconds (est.) Top Speed: 300+ mph (est.)". It also said, "It is both a sculpture that can be ridden, as well as a bold statement about the Chrysler Group's enthusiast culture and passion for design." Later press releases, in 2006 and in 2009, repeated the phrase "a potential top speed of nearly 400 miles per hour".

data source(wikipedia)