A flat engine is an internal combustion engine with horizontally-opposed cylinders. Typically, the layout has cylinders arranged in two banks on either side of a single crankshaft and is otherwise known as the boxer, or horizontally-opposed engine. The concept was patented in 1896 by engineer Karl Benz, who called it the "contra engine."
Motorenwerke Zschopau GmbH, former MZ Motorrad- und Zweiradwerk GmbH is a German motorcycle manufacturer located in Zschopau, Saxony. The acronym MZ since 1956 stands for Motorenwerke Zschopau GmbH. From 1992 to 1999 the company was called MuZ, an acronym for Motorrad und Zweiradwerk.
The Honda XR series is a range of four-stroke off-road motorcycles that were designed in Japan but assembled all over the world.
Coventry Victor was a British motorcycle and car manufacturer. Originally Morton & Weaver, a proprietary engine manufacturer in Hillfields, Coventry, founded in 1904, the company changed its name to Coventry Victor Motors in 1911, the company closed in 1971.
A U engine is a piston engine made up of two separate straight engines joined by gears or chains. It is similar to the H engine which couples two flat engines. The design is also sometimes described as a "twin bank" or "double bank" engine, although these terms are sometimes used also to describe V engines.
Zündapp was a major German motorcycle manufacturer founded in 1917 in Nuremberg by Fritz Neumeyer, together with the Friedrich Krupp AG and the machine tool manufacturer Thiel under the name "Zünder- und Apparatebau G.m.b.H." as a producer of detonators. In 1919, as the demand for weapons parts declined after World War I, Neumeyer became the sole proprietor of the company, and two years later he diversified into the construction of motorcycles.
A motorcycle engine is an engine that powers a motorcycle. Motorcycle engines are typically two-stroke or four-stroke internal combustion engines, but other engine types, such as Wankels and electric motors, have been used.
The Suzuki RGV250 (Gamma) was a Suzuki high performance sport bike which had a great number of its features and design cues based on Grand Prix technologies and ideas. It is a race-replica based on Suzuki's 250 cc (15 cu in) GP bikes from 1987 to 1998, the RGV Gamma V-2 racer. This motorcycle replaced the RG250 Gamma, which employed an alloy frame with a two-stroke parallel twin engine. The bike produced over 50 bhp in a narrow power band between 8,000 and 11,000 rpm. The dry weight ranged between 128 kg (282 lb) (1989) to 140 kg (309 lb) dry weight.
The Suzuki T20 is a motorcycle with a 247 cc (15.1 cu in), two-stroke, twin-cylinder engine, and six speed gearbox. It was first manufactured in 1965 and was produced until the end of the 1968 model year. Production peaked at more than 5000 units per month. It was superseded by an updated version which was designated the T250-1. An X6 is owned by comedian Jay Leno, and one segment of his web program called Jay Leno's Garage features his profile of the motorcycle.
Ariel Motorcycles was a British maker of bicycles and then motorcycles in Bournbrook, Birmingham. It was an innovator in British motorcycling, part of the Ariel marque. The company was sold to BSA in 1951 but the brand survived until 1967. Influential Ariel designers included Val Page and Edward Turner. The last motorcycle-type vehicle to carry the Ariel name was a short-lived three-wheel tilting moped in 1970.
Greeves Motorcycles was a British motorcycle manufacturer founded by Bert Greeves which produced a range of road machines, and later competition mounts for observed trials, scrambles and road racing. The original company produced motorcycles from 1952, funded by a contract with the Ministry of Pensions for their Invacar, a three-wheeler for disabled drivers.
Yamaha TD2 is an air-cooled road racing motorcycle made by Yamaha produced between 1969 and 1970. The equivalent 350cc version was called TR2
In internal combustion engines, a split-single design is a type of two-stroke where two cylinders share a single combustion chamber.
The Scott Flying Squirrel was a motorcycle made by The Scott Motorcycle Company between 1926 and the outbreak of World War II.
The Velocette Valiant was a British motorcycle produced by Velocette from 1957 to 1963. Launched at the 1956 Earl’s Court Motorcycle Show, the Valiant had a 192 cc (11.7cu in) flat-twin engine but was expensive and criticized for its underpowered engine.
The A7 Avenger was a 350 cc (21 cu in) Kawasaki motorcycle sold 1967 through 1971.
The Yamaha R5 is a motorcycle made by Yamaha for production years 1970 (R5), 1971 (R5B) and 1972 (R5C). It was the first iteration of a new generation of horizontally split crankcase two strokes that also included the RD350 and culminated in the RD400. The engine platform also included the 250cc variants (DS7/RD250). Two earlier generations of sporting 250cc and larger displacement air-cooled two strokes preceded the R5 dating back to 1959.
The Norman Engineering Company (1919-1964) was a British manufacturer of lightweight air-cooled four-stroke industrial engines of 1 to 6hp, based at premises in London, Leamington Spa, Warwick and Uxbridge. Other products included motorcycle engines, and aircraft/automobile parts.
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