06373-ZW5-U01 Speedometer Kit - Overview. The 06373-ZW5-U01 Speedometer Kit is an essential component designed to support the instrument system of Honda marine engine systems. It plays a crucial role in accurately displaying your boat's speed as you navigate waters, ensuring you maintain proper control and awareness. Engineered to Honda's factory specifications, this speedometer kit ensures seamless integration with existing parts, keeping your marine equipment operating reliably and at peak per