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In 1984, Yamaha introduced their first four-stroke outboards, which were only available in the low-power range. In 1990 Honda released 35 hp and 45 hp four-stroke models. They continued to lead in the development of four-stroke engines throughout the 1990s as US and European exhaust emissions regulations such as CARB ( California Air Resources ...
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The most significant changes made were the 4-valve per cylinder configuration and the crossplane crankshaft found on the YZF-R1 in 2009, along with the change of cylinder sleeves to steel for high precision and high temperature durability. Throughout its long period of production, the Genesis range has successfully provided performance and ...
A dry-sump system is a method to manage the lubricating motor oil in four-stroke and large two-stroke piston driven internal combustion engines. The dry-sump system uses two or more oil pumps and a separate oil reservoir, as opposed to a conventional wet-sump system, which uses only the main sump (U.S.: oil pan) below the engine and a single pump.
This is due in part to a pinpoint oiling system that only applies oil to the necessary components, unlike the original two-stroke motors. Evinrude E-TEC was the first outboard engine technology to win the US Environmental Protection Agency 's 2004 Clean Air Excellence Award which recognizes low emission levels .
In Malaysia, this model is known as Yamaha Ego. As 2007, there were some 76,000 Ego customers in Malaysia. [ 1 ] Together with its counterpart the Yamaha Nouvo , the Mio/Ego is a platform for customization in Thailand, Malaysia, Indonesia, Vietnam and the Philippines.
Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4). The right blue side is the intake port and the left brown side is the exhaust port. The cylinder wall is a thin sleeve surrounding the piston head which creates a space for the combustion of fuel and the genesis of mechanical energy.
Tech remains a top sector pick, and will outpace the gains in the broader market next year, up a projected 19.8% in 2025 compared to 9.4% for the rest of the market, the analysts said.