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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 ...
Two-stroke model engines, most often designed since 1970 with Schnuerle porting for best performance, range in typical size from .12 cubic inches (2 cubic centimeters) to 1.2 ci (19.6 cc) and generate between .5 horsepower (370 watts) to 5 hp (3.7 kW), can get as small as .010 ci (.16 cc) and as large as 3-4 ci (49–66 cc). [2] Four-stroke ...
Ryobi Limited (リョービ株式会社, Ryōbi Kabushiki-gaisha, Japanese: [ɾʲoːꜜbi]; English: / r aɪ ˈ oʊ b i / or / r i ˈ oʊ b i /) is a Japanese manufacturer of components for automobiles, electronics, and telecommunications industries.
The combustion cycle can be either two-stroke (which results in a lighter engine for a given power output) [3] [4] or four-stroke (which produce lower levels of exhaust gas emissions). [5] [6] The fuel is usually either petrol or diesel. [7] In 1973, a small Wankel (rotary) engine manufactured by NSU was used in a lawn mower. [8]
The Honda RS250R featured a V-twin 250 cc two-stroke engine with a V-angle of 90 degrees. A new 75 degrees V-twin was introduced in 1993. A new 75 degrees V-twin was introduced in 1993. Between 1984 and 2009 the RS250R has been produced in four different generations, named: ND5 (1984), NF5 (1987), NX5 (1993) and NXA (2001).
The prior EJ20 used an oversquare 92 mm × 75 mm (3.62 in × 2.95 in) bore and stroke for a 1,994 cc (2.0 L) swept displacement; in comparison, the FB20 features an undersquare bore and stroke for a slightly larger displacement. All FB20 variants: Displacement: 1,995 cc (2.0 L) DOHC; Bore x stroke: 84 mm × 90 mm (3.31 in × 3.54 in)