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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.
1980 saw the further widening of the range, with the introduction of the PE400T. This was unusual in that the 397cc (85mm x 70mm) 5-speed engine was specifically designed for the PE Series and did not leverage the contemporary RM400 motocross engine. The 400 engine was deliberately designed as an enlarged RM250 and including primary kick.
The Yezdi Roadking was based on the 1974 CZ 250 Falta, where the original bore and stroke of 70 mm × 64 mm (2.76 in × 2.52 in) was retained, but detuned for lower power than its Motocross original. The engine block is smaller than and different from the Yezdi Classic/Model B in appearance.
Maicoletta scooter Maicoletta Dash. The Maicoletta motor scooter of the 1950s was one of the largest motor scooters produced by any manufacturer until the modern era. [7] The engine was a single cylinder 247cc piston-port two-stroke (an export version featuring a 277cc engine was also produced for use with a sidecar), with four foot-operated gears, enclosed chain drive, centrifugal fan cooling ...
Clews started building motocross bikes in his garage. Having no access to BSA works engines, Clews made his own extensive improvements to the standard BSA B50 500 cc engine, obtained by breaking up B50 MX bikes. His reputation grew as a builder of four-stroke motocross bikes that were capable of competing with the dominant two-stroke bikes.
L – Rupp manufactured two L-series dirt bikes in 1973, the L80 and L100. Both bikes used 2-cycle Fuji engines, in 80 and 100cc sizes. They were equipped with four- and five-speed manual transmissions, respectively. SS – The SS-5 was Rupp's only dirt bike that used a Tecumseh engine and automatic transmission. The engine was a Tecumseh HS50 ...