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The Aprilia SR50 is a family of sport scooters built by Italian motorbike company, Aprilia. Introduced in 1992 and considered to be the first "sports" scooter, the design and technology of the SR50 has evolved considerably over the years, although it has consistently used a 2-stroke 50cc displacement engine. Design With sports oriented suspension and tyres, and a more powerful engine than most 50cc designs, it is faster than many and more agile than most other scooters, consistent with its "sports" marketing. Sales of the SR50 have reached over 800,000 units, providing a stark exception to the trend in motorcycles since the 1990s for two-stroke engines to fade away. Through constant technology upgrades, the bike conforms to EURO 3 emission standards despite being a two-stroke. Certain colours (as well as 'limited edition' graphics packages, etc.) were only available in certain countries at certain times. In other words, not every colour has always been

The Acabion GTBO 35 is a concept car with two seats and a drop-shaped body. The passenger is placed behind the driver. Power is provided by a 1300cc turbocharged 4 cylinder gasoline engine capable of putting out 500 and 750 horsepower also with everything in between those figures, and is mounted behind the passenger compartment. Under normal conditions the Acabion concept drives on its two main wheels like a motorcycle, but at low speeds or if balance is lost at high speeds the two side wheels are designed to lower themselves automatically to aid stability. Awards The Acabion electric-drive concept was awarded with the German future-award 2008 as the best prototype of the year.(Zukunftsaward, Frankfurt Main, www.zukunftsinstitut.de). Performance The designers claim that the 2009 GTBO concept car weighs 340 kg (750 lb) and has a 750 hp gasoline engine, resulting in a power to weight ratio of 2,200 horsepower (1,600 kW) per ton.