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Prior to the late 2010s, forced induction was only used on a handful of production motorcycles, all from Japanese Big Four manufacturers in the early 1980s. [1] [2] [3] Honda 1982 CX 500 Turbo / 1983 650 Turbo; Yamaha 1982-1983 XJ 650 Seca Turbo; Suzuki 1983 XN 85 Turbo; Kawasaki 1983-1985 GPZ750 Turbo; Honda CX650 Turbo had a 674 CC, 100 BHP V ...
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.
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 ...
A "twingle" is a four-stroke twin-cylinder engine with an altered firing order designed to give power pulses similar to a single-cylinder four-stroke engine. Inline twins with a 360° crankpin offset or flat-twins can be easily converted into twingles by firing both of the cylinders at the same time and installing a camshaft or camshafts that ...
"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 FIM initially banned their motorcycle from competing after their engines did not conform FIM rules [3] and the team was forced to run modified two-stroke, ten-year old Yamaha motorcycles until a compliant engine was ready at the 2003 Portuguese motorcycle Grand Prix, but the partnership lasted until 2005, when a technical partnership with ...
Kroger’s $25 billion proposed takeover of rival Albertsons ultimately failed because two judges – one federal and the other from the state of Washington – didn’t buy the competitive vision ...
The Yamaha XS750 and XS850 was a line of inline three cylinder motorcycles produced by the Yamaha Motor Corporation from 1976 to 1981 for the worldwide motorcycle market. It was publicly voted by readers as the 1977 Motorcycle News Machine of the Year, ousting the sitting-winner of four-years, the Kawasaki Z1 .