Yamaha - Gear Internal Drivetrain Component 6F5-45560-01-00. Overview. The Yamaha Gear 6F5-45560-01-00 is one of those internal parts that keeps everything turning the way it should. When a gear starts to wear or chip, you'll usually hear it first-grinding, rough operation, or performance that just feels off. It plays a key role in transferring power through the system, so it needs to stay properly aligned and in good shape. If you're already inside the lower unit or engine, this is one of those parts worth replacing while you're in there.. Key Features. • Reliable Power Transfer - Moves rotational force between components for smooth and consistent operation.. • OEM Fit Precision - Built to Yamaha specifications for proper gear meshing and alignment.. • Smooth Gear Engagement - Helps reduce friction and unwanted noise during operation.. • Durable Load Handling - Designed to withstand continuous torque and marine operating conditions.. Engine & Boat Compatibility. Verify compatibility w