Yamaha 4KB-46127-50-00 Drive Piston Shim Assembly

The Yamaha 4KB-46127-50-00 Drive Piston Shim is a hardened-steel, OEM-grade shim designed to provide precise spacing and alignment of drive piston components within Yamaha drivetrain and clutch assemblies. It features a precision-machined design with high-precision thickness control and is built to distribute mechanical load evenly, helping maintain correct clearance for smooth engagement in Yamaha motorcycles. Intended for maintenance, repair, and gearbox adjustments that require OEM-compatible shimming, it fits Yamaha model-specific drivetrain applications and sits between the piston and mating components during installation. Common replacements include Yamaha 4KB-46127-40-00, 4KB-46127-60-00, and 4KB-46127-30-00.