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Two-stroke motorcycles are a type of internal combustion engine that completes a power cycle with two strokes of the piston during only one crankshaft revolution.
Suzuki is unusual in never having made a pushrod automobile engine, and in having depended on two-strokes for longer than most. Their first four-stroke engine was the SOHC F8A, which appeared in 1977. Suzuki continued to offer a two-stroke engine in an automotive application for a considerably longer time than any other Japanese manufacturer.
1990–2020 Historically sold worldwide in different variations with both 4-speed and 5-speed gearboxes (The 5-speed iron-barrel engine model was sold under the name Sixty-5). In 2009 iron-barrel engine production came to an end but the B5 export model, with a fuel-injected UCE engine, is sold as the Bullet 500 in almost all international markets.
2013 saw the introduction of the 300RR 2-stroke sporting Marzocchi closed cartridge forks and a Sachs rear shock. The 350 RS sported 45 mm Marzocchi USD [note 1] forks. 2014 saw the addition of a 250 cc motor to the RR 2-stroke line. A 2018 Beta 125 RR. The 2014 "Race Edition" bikes made use of 48 mm Marcocchi closed cartridge forks.
As brands scrambled to develop this newfound technology, two-stroke development went mostly dormant. Thankfully the big-foreheads on the KTM engineering team wanted to give these old-school motors ...
The MZ two-stroke engines, developed by engineer Walter Kaaden, have influenced motorcycle racing for decades. His 1961 125 cc race engine design was the first to achieve an output of 200 bhp (150 kW) per litre. [3] His revolutionary two-stroke system was copied widely in the 1960s by Japanese manufacturers.
The Bourke engine was an attempt by Russell Bourke, in the 1920s, to improve the two-stroke internal combustion engine. Despite finishing his design and building several working engines, the onset of World War II , lack of test results, [ 1 ] and the poor health of his wife compounded to prevent his engine from ever coming successfully to market.
Harley-Davidson engines are a line of engines manufactured since 1903 in Milwaukee, Wisconsin by the Harley-Davidson company for use in its motorcycles.Harley-Davidson engines are now made at Harley-Davidson Motor Company's Pilgrim Road Powertrain Operations facility in Menomonee Falls, Wisconsin.