Yamaha's Tesseract four-wheel motorcycle

October 25, 2007 Yamaha is set to reveal a whole new class of four-wheel recreational machine at the Tokyo Motor Show that looks to combine motorcycle performance and maneuverability with four wheels worth of traction and road-holding capability. Details remain sketchy on the Tesseract hybrid four-wheeled motorcycle – ostensibly a four-wheel version of the Vespa, Piaggio and Vectrix three-wheelers with tilting mechanisms (dubbed “dual-scythe suspension”) at both ends making it a carving four-wheeler that retains the advantages of narrow width roughly equivalent to a two-wheeled machine. Powered by an electric hybrid liquid-cooled V-twin, the Tesseract promises ample torque and a top speed that will be theoretical everywhere but a racetrack, and when at rest, the machine will remain upright without the need for a stand via a dual arm-lock system.

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