Suzuki GSX-R750 (1993-1995) [117/352] Diaphragm and piston operation

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FUEL AND LUBRICATION SYSTEM 4 6 DIAPHRAGM AND PISTON OPERATION The carburetor is a variable venturi type whose venturi cross section area is increased or decreased automatically by the piston valve which moves according to the negative pressure present on the downstream side of the venturi Negative pressure is admitted into the diaphragm chamber through two orifices provided in the piston valve Rising negative pressure overcomes the spring force causing the piston valve to rise to in crease the said area and thus prevent the air velocity from increasing Thus air velocity in the ventu ri passage is kept relatively constant for improved fuel atomization and for securing optimum ratio of fuel air mixture LOWER POSITION OF PISTON VALVE NEGATIVE PRESSURE ATMOSPHERIC PRESSURE

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