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A Base 50 engine is a generic term for engines that are reverse-engineered from the Honda 49 cc (3.0 cu in) air-cooled four-stroke single cylinder engine. Honda first offered these engines in 1958, on their Honda Super Cub 50. Honda has offered variations of this engine continuously, in sizes up to 124 cc (7.6 cu in), since its introduction.
The Honda SFX50 is a 49 cc (3.0 cu in), two stroke, air-cooled, single cylinder, scooter-style moped manufactured between 1995 and 2004 by the Honda Motor Company.It complied with the United Kingdom licence restrictions of the time and was equipped with continuously variable automatic transmission (Honda V-Matic Transmission) and capacitor discharge electronic ignition.
It typically falls into class with other two-stroke 50cc road bikes such as the Yamaha YSR50, but is also commonly classed with up to 110cc four-stroke bikes. The NSR50's engine (designated as AC08E), is a horizontal, single cylinder, water-cooled, two-stroke engine that uses piston port injection. It has an inner diameter x stroke = 39.0x41.4 ...
A distinctive feature of the PC50 is the use of a four-stroke engine, at a time almost all pedal-equipped mopeds used two-stroke engines. Honda's early development of 50 cc four-stroke engines was a result of Soichiro Honda's dislike of the sharp noise of two-stroke engines. [2] The PC50 used two different engines during its production.
The Honda Motor Company of Japan released the Honda Express (NC50) to the North American market in 1977. This new bike was designed to enter the large market for scooters that developed following the 1973 oil crisis. As such it came with a fuel-efficient single-cylinder two-stroke engine. It was also designed to be simple to operate, as many ...
The change and long-term commitment to the more sophisticated four-stroke technology came either directly from founder Soichiro Honda [6] or indirectly due to pressure from managing director Takeo Fujisawa, who was said to be appalled by the noise and smoke that two-stroke engines produced and the additional hassle that Honda customers faced by ...
Both models came in 4 versions; 80cc unrestricted (F), 80cc restricted (S), 50 cc unrestricted (F) and 50cc restricted (S), two-stroke. Honda left its four-stroke program temporarily because it was aimed at the European and South African moped markets for 16-year-olds, the legal age at which someone could ride a 50 cc motorcycle in South Africa ...
Two-stroke engines often have a higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines can also have fewer moving parts, and thus be cheaper to manufacture and weigh less. In countries and regions with stringent emissions regulation, two-stroke engines have been phased out in ...