Yamaha Water Tube Set Plate 6T4-44373-00-00. Overview. The Yamaha Water Tube Set Plate 6T4-44373-00-00 is a genuine original equipment manufacturer component designed to support and secure the water tube within your engine's cooling system. This plate plays a critical role in maintaining proper alignment and ensuring efficient water flow for optimal cooling performance.. Engineered to Yamaha's exact specifications, this set plate provides a precise fit and dependable durability. It is an ideal r