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Model ID: DY76
The DY76 Motorcycle Vacuum Fuel Pump is a high-performance pulse-driven pump specifically calibrated for mid-to-large displacement motorcycles and ATVs (typically ranging from 150cc to 600cc). In many motorcycle designs, the fuel tank is positioned lower than the carburetor, or the fuel path is restricted by the frame geometry, making gravity feed impossible. The DY76 solves this by utilizing the engine's intake pulses to create a reliable vacuum-driven pumping action. This eliminates the need for complex electrical fuel pumps, reducing the load on the motorcycle’s charging system and removing the risk of electrical motor failure.
Engineering for the motorcycle market requires a focus on vibration resistance and flow stability. The DY76 features a triple-chamber diaphragm design, which smoothes out the pressure pulses from the engine to provide a more constant, "non-surging" fuel delivery to the carburetor float bowl. This ensures that the engine doesn't "starve" during high-RPM wide-open throttle (WOT) conditions or stall during low-RPM idling. The body is manufactured from corrosion-resistant zinc or aluminum alloy, and the internal valve seats are precision-lapped to prevent fuel backflow. Equipped with a high-tensile internal return spring, the DY76 is tuned to operate efficiently even at the high-frequency pulses generated by multi-cylinder motorcycle engines, making it a rugged and dependable choice for both OEM manufacturers and aftermarket builders.
