Yamaha - Oil Pipe Assembly 1 Lubrication System Component 6S5-13405-00-00. Overview. Oil pipes are one of those parts you don't get a second chance with. I've seen engines suffer real damage just because oil wasn't moving the way it should. When everything is flowing right, the motor runs smoother and lasts longer without issue. It's a simple piece, but it's critical for keeping the engine protected every time you run it.. Key Features. • Consistent Oil Flow Delivery - Ensures steady lubrication to critical internal engine components.• OEM Fit and Routing - Matches factory layout for proper installation and correct oil path.• Leak-Resistant Design - Helps prevent oil loss and maintains system integrity.• Durable Construction - Built to handle heat, vibration, and continuous engine operation.. Engine & Boat Compatibility. Designed for Yamaha outboard engines utilizing oil injection or internal lubrication systems. Commonly used across a range of Yamaha outboards where reliable oil deliv