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The Norton Challenge P86, also known as the Norton Cosworth, is a racing motorcycle designed in 1973 by Keith Duckworth of Cosworth Engineering for Norton Motorcycles.The 750 cc (46 cu in) DOHC vertical twin was essentially two cylinders from Cosworth's world championship winning V8 DFV Formula One engine.
The Norton Manx or Manx Norton is a British racing motorcycle that was made from 1947 to 1962 by Norton Motors Ltd.Norton had contested every Isle of Man TT race from the inaugural 1907 event through into the 1970s, a feat unrivalled by any other manufacturer, and the development and honing of the Manx racing motorcycle was another step in this racing achievement.
The Honda CBX motorcycle (1978–1982) contains a 1047cc inline-6-cylinder engine. The engine used a DOHC 24-valve cam-over-bucket valvetrain to support high RPMs. The engine used a DOHC 24-valve cam-over-bucket valvetrain to support high RPMs.
The engine is an air-cooled 498 cc (30.4 cu in) double overhead cam (DOHC) vertical parallel twin with 180° crankshaft angle, and torsion bar valve springs. The air/fuel mixture is delivered by two 32 mm Keihin Constant Velocity (CV) carburetors. The transmission is a 5-speed.
The Honda CB450 is a standard motorcycle made by Honda from 1965 to 1974 with a 444 cc (27.1 cu in) 180° DOHC straight-twin engine. Producing 45 bhp (some 100 bhp/ litre), it was Honda's first "big" motorcycle, though it did not succeed in its goal of competing directly against the larger Triumphs, Nortons, and Harley-Davidsons in the North American market at the time. [3]
Motorcycles with a V-twin engine mounted with its crankshaft mounted in line with the frame, e.g. the Honda CX series, are said to have "transverse" engines, [1] [2] while motorcycles with a V-twin mounted with its crankshaft mounted perpendicular to the frame, e.g. most Harley-Davidsons, are said to have "longitudinal" engines.
[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 ...
Iconic DOHC engines of this period include the 1948–1959 Lagonda straight-six engine, the 1949–1992 Jaguar XK straight-six engine and the 1954–1994 Alfa Romeo Twin Cam inline-four engine. [41] [42] The 1966-2000 Fiat Twin Cam inline-four engine was one of the first DOHC engines to use a toothed timing belt instead of a timing chain. [43]