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The YZ125 has a 124 cc (7.6 cu in) reed valve-inducted two-stroke engine. It was air cooled from 1974 to 1980, and liquid cooled since 1981. It has a Mikuni 38 mm TMX series carburetor. [6] The engine produces 35 hp (26 kW). [1] The YZ125 has been built with five- or six-speed manual sequential gearbox depending on model year.
The Yamaha YZ450F is a four-stroke racing motocross bike built by Yamaha Motor Corporation.It was the successor to the previous YZ426F which was discontinued in 2003. It is credited by Cycle World and Dirt Rider magazines as the bike that started the four-stroke dirt bike revolution.
Yamaha Y125Z or better known as Yamaha Z (in Europe, Thailand and Vietnam) is a 125 cc two-stroke moped or underbone motorcycle produced by Yamaha.Debuted in 1998 as a successor of Yamaha Y110SS, the Y125Z was the first two-stroke underbone motorcycle with an YEIS catalytic converter.
The original YZ250 of 1974 used an air-cooled 250cc two-stroke engine of 70 mm bore and a 64 mm stroke, which was improved semi-annually. The air-cooled motor was replaced in 1982 with a 249 cc liquid-cooled two-stroke reed-valved engine with a mechanical, rather than servo-driven, YPVS exhaust valve for a wider spread of power.
The 1,198 cc (73.1 cu in) V4 engine from the Mk1 Venture was modified for performance and was used as the engine in the Yamaha V-Max. Yamaha resurrected the Venture's V4 engine in 1996 in the Royal Star cruiser, then later brought out a full touring version in 1999 as the Royal Star Venture .
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.
Enforcement Motors removed the Yamaha crash bars, rear trunk, and foot wind deflectors, opting for larger "canyon cages", a larger and heavier aluminum fabricated trunk and large lights mounted high. EVS opts for keeping the factory Yamaha parts, with a much narrower overall body, and adding lighting to flow with the motorcycle.
2002 was the first season that allowed 990 cc 4-strokes to be raced alongside 500 cc 2-strokes.In a change from their V-4 YZR500, Yamaha designed the YZR-M1 (for "Mission One") with an inline-4 engine because it was the format considered to have the best mutual balance with the frame. [2]