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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.
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 stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...
Honda made 2 models of the PA50; the PA50II, which could reach speeds of 30 mph (45 km/h), and the PA50I, which could only reach speeds of 20 mph (32 km/h). The easiest way to identify a PA50I model is by its red and white (1978) or all red and black (1979) paint job and sticker saying it is a PA50I/PA50M (this does not apply to all bikes though).
The Honda P50 (known as the P25 in some markets) was introduced in June 1966. It was the last motor-wheel moped design by Honda (and probably by any other large manufacturer). The P50 features a step-through frame made from steel pressings, leading-link front suspension, plastic fenders and chainguard.
Honda began their first 50 cc GP season with the RC110, announced at the Japanese Motor Show in 1961. Powered by a single cylinder, four-valve engine, and with gear driven double overhead cams, giving about 9 hp (6.7 kW) at 14,000 rpm.
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.
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 ...