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Radiator Cooling Thermo Fan Switch Thermostat – Hyosung GV125-S (Bobber 125 S EFi)

Estimated delivery dates: Jun 18, 2026 - Jun 23, 2026

£25.99

💎 RADIATOR FAN SWITCH THERMOSTAT | GV125S EFi

Prevent catastrophic engine overheating with a reliable switch. This vital sensor sits in your radiator and tells the fan when to kick in. A failing switch is a common cause of stranded commuters—replace it with this OEM-spec unit to ensure your engine temperature stays under control.

  • Function: Triggers the cooling fan at the exact factory temperature.
  • 🛠️ Reliability: Prevents overheating and potential engine damage.
  • ⚙️ Quality: Aftermarket unit meets or exceeds OEM specifications.
  • 📦 Install: Simple swap during a coolant service.

💡 SPECIAL ORDER: Please allow extra time for delivery.
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Description

Keeping your liquid-cooled EFi V-Twin running at the correct temperature is non-negotiable for life on the road. The original cooling fan switch thermostat is a critical component that can fail without warning. When it does, your engine overheats, leaving you stranded. 


💎 Essential Engine Health & Reliability

A perfect fit that offers peace of mind, especially for daily commuters and garage mechanics.

Accurate Temp Sensor
Triggers fan precisely.
Aftermarket Quality
Matches OEM reliability.
Easy Diagnostics
Simple 2-wire connector.
Fit & Forget Logic
Built for long service intervals.

📜 Confirmed Fitment Guide

FITS: Hyosung GV125S Bobber (V-Twin EFi model).
📅 YEARS: All S models from 2019+ onwards 
WILL NOT FIT: Older pre-2019 carbureted GV125s, GT125, GT250, or any 300cc models.

💡 MAINTENANCE ESSENTIAL:
When replacing this sensor, you should always flush your old coolant and replace it with fresh, high-quality engine coolant.

🔧 Install Tips

  • Cool Down First: Never open the cooling system when hot. Wait until the engine is cold to avoid serious burns.
  • Bleed the Air: After fitting and refilling the coolant, you must bleed all air out of the system. Check your manual or the forums for the correct procedure.

📧 NEED GUIDANCE? Email us or visit the HyoRiders Forums for detailed install tutorials and diagnostics help on cooling system issues.

Additional information

Weight 0.4 kg
Dimensions 3 × 3 × 3 cm

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