Front Brake Master Cylinder – Hyosung GT125 GT125R GT250R GT250

Description

When the original GT125/GT250 front master cylinders were discontinued, the market was flooded with cheap, unsafe universal clones. We refuse to supply £10 junk because your brakes are your life. Sourced directly from South Korea, this aftermarket unit is a workshop-grade upgrade. It provides a significant increase in fluid pressure and has been rigorously tested on our own custom Hyosung builds and dual-disc 650cc models.

💎 Precision Braking, Workshop Trusted

Built to handle more than your 125 or 250 requires—offering massive safety margins.

📜 Confirmed Fitment Guide

🔧 Safety & Installation Tips

• Professional Install: Brakes are critical. If you aren’t experienced in bleeding hydraulic systems, have a professional bike garage handle the installation.
• Fluid Choice: Use only fresh, high-quality DOT 4 fluid. Never leave the reservoir open to the air longer than necessary.
• Clearance Check: Once installed, turn the bars fully to the left and right. Ensure there is no binding or contact with fairings or tank.

📧 FITMENT QUESTIONS? Email us with your bike details. For technical help or community opinions, visit the HyoRiders Forums.

This master cylinder fits all GT125/GT250 Naked models (2003–2020), but only fits GT125R/GT250R (GTR) with updated fairings (2012–2020).

GTR 2012–2020 (RC) ✔ Compatible (See pic)

GTR 2005–2011 ❌ NOT Compatible (See why below)

Important Note:
Older 2005–2011 GTR fairings sit closer to the lever and master cylinder. Turning the bars fully left will cause this bigger aftermarket unit to hit the black panel surrounding the digital speedometer.
➡ If you have a 2005–2011 model, contact us for a smaller alternative.