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2. 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 ...

3. Schrader valve - Wikipedia

   en.wikipedia.org/wiki/Schrader_valve

   The Schrader valve consists of a valve stem into which a valve core is threaded. The valve core is a poppet valve assisted by a spring. A small rubber seal located on the core keeps the fluid from escaping through the threads. Using the appropriate tools, a faulty valve core can be immediately extracted from the valve stem and replaced with a ...

4. Compression release - Wikipedia

   en.wikipedia.org/wiki/Compression_release

   Once the engine spins to starting speed, centrifugal force causes the lever to move out of the way, and the exhaust valve is allowed to seat fully. [4] Older compression release systems used a small bump on the cam that would bump the valve very slightly at low speeds. Once the engine gained speed, the pressure would push the exhaust valve ...

5. Poppet valve - Wikipedia

   en.wikipedia.org/wiki/Poppet_valve

   The word poppet shares etymology with "puppet": it is from the Middle English popet ("youth" or "doll"), from Middle French poupette, which is a diminutive of poupée.The use of the word poppet to describe a valve comes from the same word applied to marionettes, which, like the poppet valve, move bodily in response to remote motion transmitted linearly.

6. Desmodromic valve - Wikipedia

   en.wikipedia.org/wiki/Desmodromic_valve

   A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring. The valves in a typical four-stroke engine allow the air/fuel mixture into the cylinder at the beginning of the cycle and exhaust spent gases at the end of the cycle.

7. List of auto parts - Wikipedia

   en.wikipedia.org/wiki/List_of_auto_parts

   Combination valve; Dual circuit brake system; Hold-down springs (retainer springs) Hose. Brake booster hose; Air brake nylon hose; Brake duct hose; Hydraulic booster unit; Load-sensing valve; Master cylinder; Metering valve; Park brake lever/handle ; Pressure differential valve; Proportioning valve; Reservoir; Shoe return spring; Tyre; Vacuum ...