Yamaha Motor Co., Ltd. 4KB-46119-A0-00 Thrust Shim

The Yamaha 4KB-46119-A0-00 Thrust Shim is a precision-machined hardened steel spacer used in Yamaha motorcycle transmissions and drivetrain assemblies to control axial movement and maintain proper spacing between gears and shafts. Designed for OEM-grade reliability, it enables precise end-play adjustment and axial load distribution to help preserve alignment and reduce wear in operation. This shim is positioned between rotating components within the transmission/drivetrain system and is compatible with Yamaha motorcycles (model-specific fitment), installed during maintenance, repair, or gearbox adjustment projects. Common replacements include Yamaha 4KB-46119-90-00, 4KB-46119-B0-00, and 4KB-46119-C0-00 thrust shims.