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  2. Yamaha YZ250F - Wikipedia

    en.wikipedia.org/wiki/Yamaha_YZ250F

    The Yamaha YZ250F is a motocross motorcycle first released in 2001 by Yamaha. It features a DOHC , four-stroke engine and initially had a steel frame and subframe in 2001–2002. In 2003 it received an aluminum subframe, which was replaced in the 2006 model with an all-aluminum frame.

  3. Four-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_engine

    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.

  4. Slider-crank linkage - Wikipedia

    en.wikipedia.org/wiki/Slider-crank_linkage

    This balanced motion implies other ideas as well. Assuming the crank arm is driven at a constant velocity, the time it takes to perform a forward stroke is equal to the time it takes to act a reverse stroke. The crank moves in only one direction, provided the position and condition of the slider are not externally altered.

  5. Yamaha WR250R - Wikipedia

    en.wikipedia.org/wiki/Yamaha_WR250R

    The Yamaha WR250R was a dual-sport motorcycle made by Yamaha Motor Company. It has a 250cc (15 cu in) liquid-cooled single-cylinder four-stroke DOHC engine, fed premium fuel by electronic fuel injection. [3] It remained largely unchanged since its introduction in 2008, with most differences being cosmetic. [4]

  6. Motor controller - Wikipedia

    en.wikipedia.org/wiki/Motor_controller

    A motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. [1] A motor controller might include a manual or automatic means for starting and stopping the motor, selecting forward or reverse rotation, selecting and regulating the speed, regulating or limiting the torque, and protecting against overloads and electrical ...

  7. Power shuttle - Wikipedia

    en.wikipedia.org/wiki/Power_shuttle

    During, the pressure rise,F-R clutch is in energized condition which makes the vehicle to move forward/Reverse direction. Flow to tank line is blocked during the flow to F/R clutch. Power shuttle are incorporated in transmissions in three forms: counter-shaft , full planetary (power shifts) , and CVT transmissions .