Rear Brake Master Cylinder For Yamaha XT250 YZ125 YZ250 5UN-2583V-00-00,Silver

Rear Brake Master Cylinder for Yamaha XT250 YZ125 YZ250

This rear brake master cylinder replaces the factory unit on Yamaha XT250, YZ125, and YZ250 models, cross-referencing OEM part number 5UN-2583V-00-00 to pressurize the rear brake and deliver dependable stopping power.

Overview

This rear brake master cylinder is a direct replacement designed to restore reliable hydraulic braking on Yamaha XT250, YZ125, and YZ250 machines. Built to match the OEM 5UN-2583V-00-00 reference, this rear brake master cylinder converts lever input into hydraulic pressure for consistent rear brake response on both trail and track. It suits riders replacing a worn or leaking master cylinder who want a straightforward bolt-on fit.

Built For Performance

• Cross-references OEM part number 5UN-2583V-00-00 for confident replacement
• Machined cylinder body for stable hydraulic pressure delivery
• Silver finish that resists corrosion from dirt and moisture
• Sealed internals built to hold brake fluid pressure under hard use
• Threaded ports matched to the standard Yamaha rear brake line fitting
• Compact body sized for the original mounting location

Fits These Machines

• for Yamaha XT250
• for Yamaha YZ125
• for Yamaha YZ250

On-The-Job Use

• Rear brake rebuilds on trail and enduro bikes
• Motocross track maintenance and race preparation
• Restoring hydraulic rear braking after a fluid leak
• Replacing a seized or spongy rear master cylinder

Specs At A Glance

Good To Know

Q: Does this master cylinder come ready to bolt on? A: It is a replacement rear brake master cylinder that fits the listed Yamaha models, though you should confirm the mounting and line fittings match your machine before ordering.

Q: Will I need to bleed the brake after installing it? A: Yes, any time a master cylinder is replaced the rear brake system must be bled to remove air and restore firm lever feel.

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