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The engine oil specified is Yamalube 4-stroke motor oil (20W40 type SF) or equivalent. Yamaha also warns not to use oils that contain anti-friction modifiers or car oils (often referred to as energy-conserving oils) that contain anti-friction additives, since this will cause clutch slippage and will in turn reduce the life of components and ...
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]
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.
The bike had an 11,600 rpm redline [8] [better source needed] power and torque close to its 250 cc two-stroke rivals. [1] It benefited from engine compression braking, which allowed the engine to slow the bike down during deceleration, giving the brakes a rest. [1] The 1998 YZ400F was the first bike to come stock with a Keihin FCR carburetor.
"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 ...
Yamaha entered the ATC market in 1980, after paying patent-right to Honda to produce their own version of the All Terrain Cycle. Starting modestly with a 125cc recreational ATC that would remain the foundation of their line through 1985, the YT125 featured a 2 stoke engine with sealed airbox with snorkel intake, an autolube oil injection system, and featured a narrow tunnel above the engine ...