We start with an Keihin PWM or PWK 38mm carburetor and convert it into a "pump-around," for reliability and repeatable performance. To achieve this, the floats and needle seat are removed and a tube and restricter are inserted.Two fuel pumps are utilized . One pump is used exclusively to pump fuel from the gas tank to the carburetor, while a 2nd pump is used to remove excessive fuel and return it to the tank. This system ensures that the float bowl has the correct amount of fuel, at all times.this kit includes the fuel pumps & Pulse Plate. In stock ready for delivery
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