Rear Brake Master Cylinder – Hyosung GD250R GD250N
Keep your rear brake pedal firm and reactive. Because the original factory hydraulics are discontinued, this workshop-tested aftermarket alternative is essential insurance against unsafe fluid bypass or total pedal fade. Don’t risk cheap bodge fixes on critical hydraulic circuits when trying to pass road safety inspections.
- Tested Quality // Community road-tested and verified on high-demand 650cc platforms.
- Direct Fit // Correct fluid orientation to mount securely without buying sketchy adaptors.
- Safety Essential // Delivers consistent hydraulic line pressure right down to your rear caliper.
- Note // Frame bolts aren’t included; the assembly may require alternate mounting hardware.
Description
Hyosung has completely ceased production of the original factory rear brake master cylinder assemblies for the GD250 chassis series. When looking for a replacement, unbranded universal reservoir clones often present dangerous internal bore tolerances. We source and supply only trusted, bench-tested cylinder components that deliver the predictable, sharp stopping feedback required for everyday safety and official vehicle inspections.
💎 Technical Performance Spec
| Proven Hydraulic BoreInternal piston design heavily proven on heavyweight 650cc configurations. | Solid Leak-Free HousingPrecision seals designed to hold solid line pressure without bleeding down. |
| Reliable Pedal FeelEliminates that spongy, dangerous linkage play caused by degraded old seals. | Inspection CompliantMeets local road safety standards for rear-wheel brake efficiency. |
📜 Model Fitment Guide
Confirmed Chassis Matches: Fits Hyosung GD250R and GD250N naked variants built across the 2014 to 2020 production cycle.
69609HN9100, 69609HN9101, 69609HP9502, 69609HP9503, 69609HC9700
You will need a completely fresh, unopened bottle of high-grade DOT 4 brake fluid to prime and install this cylinder setup safely. Reusing dirty fluid from your reservoir will ruin the internal seals. Grab a fresh bottle and a one-way bleeder tool to make flushing the lines easy.
🔧 Install Tips
- Check Bolt Clearance: Supply factories occasionally cut the mounting holes with a marginally slimmer diameter. Keep a set of replacement mounting bolts handy or tap out the bracket holes if required.
- Flush the Complete Line: Clean away any crusty crystallized residue inside the old rubber hose before popping it onto the fresh plastic supply nipple.
- Protect the Bodywork: Brake fluid acts like paint stripper on exposed engine casings and frame paint. Cover up your swingarm and exhaust link pipe before opening the banjo bolt.
For workshop write-ups, bleeding techniques, or technical support, head to the forums.
Additional information
| Weight | 1 kg |
|---|---|
| Dimensions | 15 × 15 × 4 cm |
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