Yamaha Motor Co., Ltd. 36Y-25412-00-00 Lock Washer

The Yamaha 36Y-25412-00-00 Lock Washer is a split/locking washer designed to prevent loosening of bolted joints under vibration and dynamic load in Yamaha motorcycle fastening systems. Made from hardened steel with a coated surface for corrosion resistance, it sits between the nut or bolt head and the mating surface to secure fasteners and maintain structural and mechanical stability. This OEM-spec component (MPN 36Y-25412-00-00; cross reference 36Y-25412-00) supports model-specific fitment on Yamaha motorcycles and is commonly used in maintenance, repair, and retrofit tasks where reliable nut-and-bolt retention is required. Typical applications include securing critical connections in two-wheeled vehicle assemblies where vibration could cause loosening, and it serves as a direct replacement or retrofit part within Yamaha service workflows. Common replacements include Yamaha 90215-08020-00, 90215-10004-00, and 90215-12003-00, which are compatible equivalents in many Yamaha applications.