Yamaha Xmax 300 Oil Pump Assy (B74-E3300-00)

The Yamaha XMAX 300 Oil Pump Assembly (B74‑E3300‑00) is a vital engine component responsible for circulating engine oil throughout the scooter’s internal lubrication system. Its main function is to draw oil from the oil reservoir and deliver it under pressure to critical moving parts such as crankshaft bearings, camshafts, piston skirts, and other friction surfaces. This constant circulation of oil reduces wear, cools components, and prevents premature engine damage.

This oil pump assembly is engineered to precise factory specifications to ensure proper oil flow rate and pressure under all normal operating conditions. It is built from durable materials capable of withstanding high temperatures, rotational forces, and prolonged use. Over time and prolonged riding, the original oil pump can wear, lose efficiency, or develop internal leakage, leading to reduced oil pressure, increased engine wear, and overheating. Replacing a worn or failing oil pump with this genuine‑style assembly helps restore correct lubrication performance, improves engine longevity, and maintains smooth, dependable performance from the XMAX 300’s powertrain.