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The only moving parts inside simple two-stroke engines are the crankshaft, the connecting rod, and the piston. It is the same simplicity in design, however, that causes a two-stroke engine to be less fuel-efficient and produce high specific levels of undesirable exhaust gas emissions. At the bottom of the power stroke, the transfer ports, which ...
The Yamaha RD500LC is a high-performance, two-stroke sports motorcycle, also known as the RZ500 in Canada and Australia. A lightened but detuned version known as the RZV500R was developed for the Japanese home market.
The RD350 is a two-stroke motorcycle produced by Yamaha from 1973 to 1975. [2] It evolved directly from the piston port (pre-reed valve intake tract), front drum-braked, five-speed Yamaha 350 cc "R5".
The Yamaha RZ350 is a two-stroke motorcycle produced by Japanese motorcycle manufacturer Yamaha between 1983 and 1996. Available in the US from 1983 to 1985, Canada until 1990 and Brazil until 1996. The RZ was the final evolution of the popular and well-known series of RD Yamaha motorcycles, and as such is also known as the RD350LC II or RD350 ...
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.
A 250cc air-cooled twin two-stroke design includes a 12v battery ignition and a five-speed transmission. Making nearly 30 hp (22 kW) @ 7,500 r/min, the published top speed was 93 mph, with a 1/4 14.8 second quarter mile time. The DS7 is the forerunner of the Yamaha RD motorcycle series started in 1973.