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The motorcycle is powered by a split-single two-stroke engine (two pistons sharing a single combustion chamber). It was marketed in the United States by Sears as the "Allstate 250" or "Twingle", with the model number SR 250, and sold primarily via the Sears catalog. [1] It was a common "first motorcycle" for many riders. [2]
Other split-single models from TWN were the 1954-1957 TWN Cornet (200 cc with 12 volt electrics and optionally electric starter), the 1953-1957 TWN Boss (350 cc) with 2 carburetors and the 1954-1957 Contessa scooter (200 cc). [1] The bulbous shape of the exhaust of the Cornet and Boss is an anti-noise two-stroke TWN feature.
Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.
It is the first of Honda's tilting three-wheelers, and has the primary features of the type. It is a scooter-like single occupant vehicle with an automatic transmission and a "one push" parking brake. It has a small hinged rear pod containing the 49 cc 2-stroke engine and two drive wheels powered through a limited slip differential.
In 1988 when Jeg Sr.'s four sons, John, Troy, Mike, and Jeg Jr. were old enough, they bought the business from their father with his assistance, each managing a different department to maximize effectiveness. Business continued to grow, eventually Jegs debuted free 1-2 day nationwide shipping in 2005.
The original V50 had a 49 cc (3.0 cu in) two-stroke engine with a three speed semi-automatic gearbox and could reach speeds of about 35–40 mph (56–64 km/h). The problem with this model was that in the UK in the early 1970s to ride a 50 cc moped on a learner licence the bike needed to have pedals. So Yamaha decided to change the V50 model to ...
The first bike manufactured by Yamaha was actually a copy of the German DKW RT 125; it had an air-cooled, two-stroke, single cylinder 125 cc engine [1] YC-1 (1956) was the second bike manufactured by Yamaha; it was a 175 cc single cylinder two-stroke. [1] YD-1 (1957) Yamaha began production of its first 250 cc, two-stroke twin, the YD1. [1]
It was originally built in Japan, as a 2-stroke model until 1996. It is now assembled by Sundiro Honda Motorcycle Co., Ltd. in China. It is composed of four-stroke lines: the AF-series 50 cc (3.1 cu in) (SK50) and the JF-series 110 cc (6.7 cu in) (NSC110) are now assembled in China.