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Starter Motor Solenoid Relay – Hyosung RT125D RX125 GD250R

Estimated delivery dates: Sep 4, 2026 - Sep 5, 2026

£19.99

💎 STARTER MOTOR SOLENOID // FIXES SINGLE CYLINDER IGNITION ISSUES

Restore reliable ignition instantly on your single-cylinder Hyosung. This high-quality aftermarket relay replaces a failed solenoid, fixing clicking noises and starting failures. Features the correct plug for a direct fit—no wire cutting needed.

  • Plug & Play // Correct harness connector—direct swap guaranteed.
  • Compatibility // Fits RT125, RX125, and GD250 single-cylinder models.
  • Reliability // Common replacement part to solve frustrating starting problems.
  • What’s Included // 1x Aftermarket Starter Solenoid Relay.
FITMENT NOTE: This version is for single-cylinder older 125cc bikes. 
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Description

A starter solenoid is a vital component for life on everyday roads. When it fails, you are completely stuck. This quality aftermarket version ensures your single-cylinder RT125, RX125, or GD250 starts reliably every time. We ensure the plug is an exact match for your factory harness, so you avoid the frustration of generic options that require cutting and splicing wires.

💎 Get Back on the Road with the Right Part

Direct FitCorrect matching harness plug. OEM ReferenceBuilt to replace factory part 31800HG5100.
UK StockGet it sooner. Trusted QualityDurable electrical contacts for heavy amp delivery.

📜 Starting Troubleshooting Guide

Symptom Possible Cause
Continuous clicking noise Holding coil is stuck or the main contacts are failing to seal properly.
One solid click but no rotation Poor terminal connection or broken internal solenoid plunger.
Starter keeps spinning after releasing button Burnt copper points inside the solenoid have fused together.

📜 Model Fitment

Confirmed Matches: Fits the following single-cylinder models:

  • RT125 & RT125D: All carburettor years.
  • RX125 & XRX125: All models.
  • GD250R & GD250N: All production years up to 2020.
💡 ELECTRICAL MAINTENANCE ADVICE:
Always ensure a solid electrical connection down the line. Clean your battery terminals thoroughly with a wire brush and apply protective spray to prevent future surface corrosion and common starting dropouts!

🔧 Install Tips

  • Safety First: Always disconnect the negative battery terminal completely before working on any heavy gauge starter cables to avoid accidental shorts.
  • Easy Swap: Unplug the factory wire block, unbolt the twin main power rings from the posts, and drop this fresh housing straight into the rubber cushion mount.
📧 NEED HELP TRACING A IGNITION OR GROUND FAULT?For troubleshooting write-ups or wiring help from the community, head to the forums.

Additional information

Weight 1 kg
Dimensions 10 × 10 × 7 cm

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Independent Shop supplying ride enhancements and quality spares with fast dispatch. Need assistance? Access our workshop guides, manuals, tutorials or drop by the forums for troubleshooting help.