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  2. Four-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_power_valve_system

    A four-stroke power valve is a device fitted to four-stroke engines that constantly adjusts the internal diameter of the exhaust system to better suit the speed of the engine. Yamaha was the first to develop such a system, called the Exhaust Ultimate Power Valve (EXUP). [1] It first appeared on the Yamaha FZR EXUP and was later used on many ...

  3. List of Yamaha motorcycles - Wikipedia

    en.wikipedia.org/wiki/List_of_Yamaha_motorcycles

    The first bike manufactured by Yamaha was actually a copy of the German DKW RT 125; it had an air-cooled, two-stroke, single cylinder 125 cc engine [1] YC-1 (1956) was the second bike manufactured by Yamaha; it was a 175 cc single cylinder two-stroke. [1] YD-1 (1957) Yamaha began production of its first 250 cc, two-stroke twin, the YD1. [1]

  4. Straight-four engine - Wikipedia

    en.wikipedia.org/wiki/Straight-four_engine

    A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The majority of automotive four-cylinder engines use a straight-four layout [ 1 ] : pp. 13–16 (with the exceptions of the flat-four engines produced by Subaru and Porsche) [ 2 ...

  5. Yamaha TX750 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_TX750

    The TX750 is a two-cylinder standard motorcycle built by Yamaha.The bike was released in 1972. Significant reliability problems affected the engines in early bikes. Yamaha made several changes to solve the problems but the bike was withdrawn from most markets after 1974 and production stopped in the home market after 1975.

  6. Yamaha FZ1 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_FZ1

    998 cc, liquid-cooled, 20-valve, DOHC, in-line four-cylinder Bore x Stroke 74 x 58 mm 77 x 53.6 mm Carburetion (4) 37 mm Mikuni (model BSR37 x 4) CV w/ throttle position sensor (TPS) 32-bit Mikuni R1-based Electronic Fuel Injection, 45mm throttle bodies w/ throttle position sensor (TPS) Compression Ratio 11.4:1 11.5:1 Final Drive O-ring chain

  7. Yamaha T-150 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_T-150

    The Yamaha T-150 is an underbone model manufactured by Yamaha Motor Company since 2015. It is marketed under the names Exciter 150 / 155 in Latin America, Thailand and Vietnam, Sniper 150 MXi in the Philippines and Singapore, Jupiter MX/MX King 150 in Indonesia and Iran, and Y15ZR / Y16ZR in Malaysia.