Name: Rear Brake Master Cylinder - Hyosung GV125-S EFI (Bobber 125 S)
SKU: 69609KG7200
Availability: InStock

Rear Brake Master Cylinder – Hyosung GV125-S EFI (Bobber 125 S)

Estimated delivery dates: May 14, 2026 - May 16, 2026

£59.99

🛑 REAR BRAKE MASTER CYLINDER | CBS-SPEC AFTERMARKET

Reliable stopping power for your daily commute. An essential aftermarket replacement for failed OEM units, designed specifically for road-compliant CBS systems. Reclaim your rear brake confidence safely.

✅ Ride Sooner: Essential safety component to restore full braking performance.
🛠️ Fits: Hyosung GV125-S Bobber (2019+ CBS Models ONLY).
⚙️ Quality: Robust aftermarket unit; finishes may vary (Silver or Black).
📦 What’s Included: 1x Master Cylinder Unit (as pictured). Mounting bolts not included.
❌ Not included: “Reservoir White Pot” , use your old one!

💡 FITMENT CRITICAL: This unit is ONLY for bikes with CBS Brakes (Combined Braking System = Standard Hyosung Bobber 125 S GV125-S EFi)
⌚ You will get either black or grey colour (random) , please allow extra time for delivery!
❌ It will NOT work with EVO models that use digital ABS brakes (GV300S & GV125-S EVO/GV650PJ).

Description

Your brakes are the most critical safety component on your motorbike. When the original Hyosung rear master cylinder fails, you need a dependable, road-legal replacement. We refuse to sell unsafe, cheap universal junk (the kind found on AliExpress) that compromises safety. This robust aftermarket unit provides the necessary pressure and reliability for your S-Series bike, specifically designed to function correctly within the confines of the UK/EU-compliant Combined Braking System (CBS).

💎 Performance You Can Trust, Not Just Hope For

Bespoke CBS Geometry Correct internal bore for linked braking systems.	Leak-Free Assurance Restores consistent pressure and feel.
Daily Reliability Keeps your commuter safe and compliant.	Direct Hydraulics Precision actuation for reliable rear-end stopping.

📜 Confirmed Fitment Guide

✅ FITS: Hyosung GV125-S Bobber EFi (Standard Models ONLY).
📅 YEARS: 2019+ Onwards (All CBS-equipped models).
❌ WILL NOT FIT: GV300S, GV125S EVO, GV650 (These use complex ABS systems which require different parts). Match your bike’s current part to the gallery image.
📚 OEM REF: 69609KG7200 , 69609HG7201 , 69609HG7200

💡 [PAIRING]: You need fresh DOT 4 brake fluid and potentially a one-way bleed valve kit to install this correctly. Otherwise please consult a mechanic to install this for you!

🔧 Brake Safety & Install Tips

Professional Install Advised: Brakes are life-critical components. If you are unsure about installation or bleeding the system correctly, please use a professional, accredited UK garage. Incorrect installation *will* cause total brake failure.
Use Fresh Fluid: Never reuse old brake fluid. Always bleed the system with a fresh, sealed bottle of DOT 4 fluid.
Aesthetics: Finish may be silver or black depending on batch. Check the gallery picture for style confirmation.

📧 QUESTIONS? Email us or visit the HyoRiders Forums.