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  2. Two- and four-stroke engines - Wikipedia

    en.wikipedia.org/wiki/Two-_and_four-stroke_engines

    The M4+2 engine, also known as the double-piston internal combustion engine, is a type of internal combustion engine invented by Polish patent holder Piotr Mężyk. [1] The M4+2 engine took its name from a combination of two-stroke engines and four-stroke engines. The two-stroke combustion engine is characterized by a simple construction and ...

  3. How Fuel Injection Transformed The Two-Stroke Engine - AOL

    www.aol.com/fuel-injection-transformed-two...

    Manufacturers kept plugging away at roughly the same recipe for decades until Yamaha released its YZ400F four-stroke dirt bike, which won its first race (1997 Las Vegas Supercross) with relative ease.

  4. Two-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_engine

    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 ...

  5. List of motorcycles by type of engine - Wikipedia

    en.wikipedia.org/wiki/List_of_motorcycles_by...

    List of motorcycles by type of engine is a list of motorcycles by the type of motorcycle engine used by the vehicle, such as by the number of cylinders or configuration.. A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the direction of travel.

  6. Yamaha YZ450F - Wikipedia

    en.wikipedia.org/wiki/Yamaha_YZ450F

    It was the successor to the previous YZ426F which was discontinued in 2003. It is credited by Cycle World and Dirt Rider magazines as the bike that started the four-stroke dirt bike revolution. [1] [2] The 2006 YZ250F and YZ450F were the first production motorcycles equipped with titanium suspension springs. [3] The WR450F is the enduro version ...

  7. Enduro motorcycle - Wikipedia

    en.wikipedia.org/wiki/Enduro_motorcycle

    MX racing bikes have often been used as platforms for building enduro bikes. [1] This was partially driven by the conversion of MX from 2-stroke to 4-stroke engine designs to comply with regulatory trends, as well as the development of hybrid competition races such as Enduro-X. [1] Compared to MX bikes, enduro and dual-sport bikes traditionally had a much higher proportion of 4-stroke motors.

  8. Motorcycle engine - Wikipedia

    en.wikipedia.org/wiki/Motorcycle_engine

    Yamaha later raced transverse four TZ500/700/750's and virtually all the bikes in the last decade of the two-stroke GP500 era were fours, first squares then Vs, by Honda, Kawasaki, Cagiva, Suzuki, Yamaha. Kawasaki also experimented with a trapezoidal four the 602S. Yamaha made the V4 RD500LC, and Suzuki the RG400 and RG500 square four road bikes.

  9. KTM 300 - Wikipedia

    en.wikipedia.org/wiki/KTM_300

    The KTM 300 is a series of 2-stroke enduro / off-road motorcycles made by KTM.They are the Penton-inspired 1984 300 GS, the 300 DMX, the dirt only 300 MXC, European road legal 300 EXC and the US 300 XC (close-ratio), 300 XC-W (wide-ratio gear box) and 300 SX (Motocross) versions.

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