Yamaha Fuel Pump Assembly YF1-58215-20-30. Overview. The Yamaha YF1-58215-20-30 Fuel Pump Assembly is a genuine original equipment manufacturer component designed to deliver fuel efficiently from the fuel system to the engine. This assembly plays a vital role in maintaining proper fuel pressure and ensuring a steady supply of fuel for consistent engine performance.. A properly functioning fuel pump assembly helps support smooth engine operation, reliable starting, and efficient combustion. Over