Rear Brake Master Cylinder Rebuild Kit for Yamaha Replaces OEM# 1FK-W0042-50-00

Rear Brake Master Cylinder Rebuild Kit for Yamaha

This rear brake master cylinder rebuild kit for Yamaha replaces OEM number 1FK-W0042-50-00, restoring brake function on compatible models.

Overview

This rear brake master cylinder rebuild kit for Yamaha is a direct replacement for OEM part 1FK-W0042-50-00, containing all internal seals, o-rings, and the piston assembly needed to refresh a worn master cylinder. The kit restores proper brake pressure and eliminates leaks, extending the life of the original component. Suitable for various Yamaha motorcycles and ATVs that use this specific master cylinder design.

Built For Performance

• High-quality nitrile rubber seals resist brake fluid degradation
• Precision-machined piston ensures smooth movement in the bore
• Includes all necessary circlips and springs for complete rebuild
• Corrosion-resistant materials prevent pitting and wear

Specs At A Glance

Good To Know

Q: Will this rebuild kit fit any Yamaha model? A: This kit is specifically designed for Yamaha master cylinders that use the OEM number 1FK-W0042-50-00; verify compatibility with your model's parts diagram before ordering.

Q: Do I need to hone the master cylinder bore before installation? A: If the bore is pitted or scored, honing is recommended to create a smooth surface for the new seals; otherwise, a thorough cleaning is sufficient.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.