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  2. Piaggio Beverly - Wikipedia

    en.wikipedia.org/wiki/Piaggio_Beverly

    Introduced in 2001, the Piaggio Beverly has been produced in engine sizes ranging from 125 to 500 cc. Early models were powered by Piaggio's water-cooled L.E.A.D.E.R. engine. In 2005 models with 250 cm 3 and 500 cm 3 displacement were also presented and the engine range was subsequently expanded to 300 cm 3, 350 cm 3 and 400 cm 3 displacement.

  3. Piaggio Xevo - Wikipedia

    en.wikipedia.org/wiki/Piaggio_Xevo

    All models sport a single-cylinder, four-stroke, multi-valve engine that meets Euro 3 European emission standards, and have a continuously variable transmission (CVT) The 125 cc model has a carburetor 124 cc Lead engine, 11 kW (15 hp), the 250 cc has a liquid-cooled, fuel-injected 244 cc Quasar engine that delivers 16.5 kW (22.1 hp), and the 400 cc model's Master liquid-cooled, electronic fuel ...

  4. Piaggio Ciao - Wikipedia

    en.wikipedia.org/wiki/Piaggio_Ciao

    Piaggio also produced some stablemates to the Ciao: The Piaggio Si, with a telescopic front fork suspension, the Piaggio Grillo, with 14-inch wheel, Piaggio Boxer, the Si's ancestor, the Piaggio Boss, with kick starter, mass button and speedometer and the Piaggio Bravo with a telescopic front fork and a shock absorber rear suspension.

  5. Valve replacement - Wikipedia

    en.wikipedia.org/wiki/Valve_replacement

    Catheter replacement of the aortic valve (called trans-aortic valve replacement or implementation [TAVR or TAVI]) is a minimally invasive option for those suffering from aortic valve stenosis. TAVR is commonly performed by guiding a catheter from the groin to the narrowed valve via the aorta using realtime x-ray technology.

  6. Pneumatic valve springs - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_valve_springs

    Pneumatic valve springs are also found in several Moto GP motorcycle engines, debuting in 2002 with the Aprilia RS Cube. In 2005, Team Roberts was the first to use pneumatic valves full-time in their uncompetitive KTM powered bike. Today, almost all of the MotoGP teams use pneumatic valve technology on their bikes, including Yamaha, Suzuki and ...

  7. Valve job - Wikipedia

    en.wikipedia.org/wiki/Valve_job

    A valve job is the colloquial term for resurfacing the mating surfaces of the poppet valves and their respective valve seats that control the intake and exhaust of the air/fuel mixture in four stroke internal combustion engine, replacing valve oil seals, replacing any deficient valve springs, and otherwise bringing the components of a cylinder head up to manufacturer’s spec. [1] A ...

  8. Blowoff valve - Wikipedia

    en.wikipedia.org/wiki/Blowoff_valve

    A blowoff valve is designed to release pressure in the intake system when the throttle is closed. A "recirculating" type blowoff valve releases the pressurised air back into the non-pressurized section of the intake (i.e. upstream of the turbocharger), while an "atmospheric venting" type blowoff valve dumps the air directly into the atmosphere.

  9. Cutoff (steam engine) - Wikipedia

    en.wikipedia.org/wiki/Cutoff_(steam_engine)

    In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed. On a steam locomotive, the cutoff is controlled by the reversing gear.. The point at which the inlet valve closes and stops the entry of steam into the cylinder from the boiler plays a crucial role in the control of a steam engine.