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  2. Yamaha RD350 YPVS - Wikipedia

    en.wikipedia.org/wiki/Yamaha_RD350_YPVS

    Yamaha RD350 YPVS is a motorcycle that Yamaha made from 1983 to 1986. It was launched at the Cologne motorcycle show as "the nearest thing to a road going racer ever produced". [1] It had a parallel-twin two-stroke engine with identical bore and stroke of its predecessor, the Yamaha RD350LC.

  3. Yamaha RZ350 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_Rz350

    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 ...

  4. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    The YPVS is only found on the liquid-cooled bikes not air cooled versions. Yamaha have also used a guillotine version in some of their later models such as the 1994 TZR250 3XV SP model, and many later TZ road race bikes. The TZR250R 3XV SPR actually uses a Triple-YPVS, which is a combination of the guillotine and "cotton reel" designs.

  5. Yamaha RD250 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_RD250

    The Yamaha RD250 is a 250 cc (15 cu in) two-stroke motorcycle produced by Yamaha Motor Corporation between 1973 and 1987.. Four generations of RD (also known as the RZ250 in the Japanese and Australian markets) were produced: the air-cooled models from 1973 up to 1979, and from 1980 until 1987 the liquid cooled models; known as the RD250LC, RD250LC-II and RD250 YPVS.

  6. Yamaha RD350LC - Wikipedia

    en.wikipedia.org/wiki/Yamaha_RD350LC

    The 1980 to 1982 350 cc models were codenamed 4L0 and are affectionately known as Elsie. [2] This model was not officially sold in the US but was available in neighboring Canada. Yamaha debuted their breakthrough YPVS power valve system that revolutionized the two-stroke engine in the RD350 YPVS of 1983.

  7. Category : Motorcycles powered by straight-twin engines

    en.wikipedia.org/wiki/Category:Motorcycles...

    Yamaha MT-07; Yamaha R5; Yamaha RD350; Yamaha RD350 YPVS; Yamaha RD400; Yamaha TDM850; Yamaha TDR 250; Yamaha Ténéré 700; Yamaha TMAX; Yamaha TRX850; Yamaha TX500; Yamaha TX750; Yamaha XS400; Yamaha XS 650; Yamaha XT1200Z Super Ténéré; Yamaha XTZ 750; Yamaha YZF-R3; Yamaha YZF-R25

  8. Yamaha RD350 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_RD350

    The frame dimensions of the street 350 are very similar to the Yamaha TZ 250 and TZ 350 series factory road race bikes, differing mainly in weight and front fork rake – the RD being ~27 degrees and the TZ being ~25 degrees. The frames appear similar, side by side, with the street frame adorned with many brackets for the street equipment.

  9. Yamaha TZR250 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_TZR250

    Parallel-twin, reverse cylinder and finally 90° V-twin variants were produced. It evolved as a natural replacement for the popular RD 250/Yamaha RD350LC series of the 1980s. It has the Yamaha Power Valve System 'YPVS' which raises and lowers the exhaust port depending on the rpm of the engine. The YPVS servo motor starts to open at about 6,000rpm.

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