Yamaha Washer Plate - 90201-05040-00. OEM-Grade Washer Plate for Reliable Load Distribution and Fastener Support. The Yamaha - Washer, plate - 90201-05040-00 is a genuine Yamaha OEM component designed to deliver consistent pressure distribution and prevent damage in bolted assemblies. Its durable construction ensures a secure connection, minimizing wear and loosening in high-vibration environments.. Whether you're replacing a worn washer or completing a precise reassembly, this washer plate help