Yamaha Washer Plate - 90201-14027-00. OEM Precision Washer Plate for Enhanced Fastener Security and Load Distribution. The Yamaha - Washer, plate - 90201-14027-00 is a genuine factory part engineered to provide consistent load spreading and protect the surfaces of your Yamaha equipment. Whether you're performing a replacement or a full reassembly, this washer plate helps maintain the mechanical stability and integrity of your system.. Its OEM-grade design ensures compatibility and performance in