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The Yamaha V-Max, (or VMAX) is a cruiser motorcycle produced by Yamaha from 1985 through 2020. Known for its 70° V4 engine , shaft drive, and distinctive styling, the V-Max was discontinued following the 2020 model year.
The Yamaha XZ550 'Vision' is a 550 cc V-twin, shaft-driven sport touring motorcycle produced by Yamaha in 1982–1983. It was powered by a 4 stroke 70° liquid cooled 4 valve DOHC engine, and featured a trailing front axle and monoshock single swingarm rear. With a range of innovative technology for its class, nimble handling, and bold styling ...
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 ...
Yamaha bolted the engine to the frame, but much farther forward, arriving at the weight distribution of a typical motorcycle. Although it was a step-through design, TMAX was built around a motorcycle-type tubular steel frame instead of a U-section pressed steel monocoque frame, as was the case on most scooters.
"Cutaway of Yamaha Genesis inline-four 20-valve engine" The DOHC Genesis engine has five valves per cylinder and downdraft carburetors. Yamaha adopted the 5-valve concept, using three intake valves and two exhaust valves per cylinder, because it allowed both excellent volumetric efficiency and high RPM. As designers began to appreciate the ...
The Yamaha YZ250F is a motocross motorcycle first released in 2001 by Yamaha. It features a DOHC , four-stroke engine and initially had a steel frame and subframe in 2001–2002. In 2003 it received an aluminum subframe, which was replaced in the 2006 model with an all-aluminum frame.
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[7] [3] The valvetrain used double overhead camshafts (DOHC) and four valves per cylinder, which were operated by rocker arms for each pair of valves. Yamaha claimed this was the world's first mass-produced four-valve motorcycle engine. [3] The TX500 was also claimed to be the first motorcycle to use an integrated circuit-based voltage ...