US Rear Brake Master Cylinder for Honda CR125R CR250R CRF250X CRF250R CRF450R

Rear Brake Master Cylinder for Honda

This rear brake master cylinder for Honda off-road models replaces the factory hydraulic pump assembly, cross-referencing common OEM part numbers to restore rear braking pressure on CR and CRF machines.

Overview

This rear brake master cylinder for Honda is a direct-fit hydraulic pump assembly that pressurizes brake fluid to activate the rear caliper. Built for riders of CR125R, CR250R, CRF250X, CRF250R, and CRF450R machines, this rear brake master cylinder restores consistent pedal feel for trail, track, and motocross use.

Built For Performance

• Durable cast body resists flex under hard braking loads
• Precision-bored cylinder for smooth piston travel and consistent fluid pressure
• Sealed reservoir design helps prevent fluid contamination and leaks
• Direct mounting layout for straightforward replacement of the stock unit
• Compatible with standard DOT brake fluid and common rear brake line fittings
• Designed for the rear brake circuit on Honda CR and CRF off-road models

Fits These Machines

• for Honda CR125R
• for Honda CR250R
• for Honda CRF250X
• for Honda CRF250R
• for Honda CRF450R

On-The-Job Use

• Motocross tracks where predictable rear braking matters on jump approaches
• Trail and enduro riding that works the rear brake through tight sections
• Woods riding where smooth pedal modulation keeps the bike settled
• General maintenance when a leaking or seized master cylinder needs replacing

Specs At A Glance

Good To Know

Q: Does this replace the stock rear master cylinder? A: Yes, it is designed as a direct replacement for the rear brake master cylinder on the listed Honda CR and CRF models. It installs in the factory location using the original mounting points.

Q: Can I install this myself? A: Installation is straightforward for anyone comfortable bleeding a hydraulic brake system. Bleeding the rear line after installation is required to restore firm pedal feel.

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