Yamaha Crankshaft & Oil Pump Set 99999-04013-00. Overview. The Yamaha Crankshaft & Oil Pump Set 99999-04013-00 is a genuine original equipment manufacturer assembly designed to support efficient engine lubrication and smooth mechanical operation. This set ensures that the crankshaft and oil pump function together seamlessly, delivering consistent oil flow to critical engine components and reducing internal wear.. Proper lubrication is essential for maintaining engine performance and longevity. T