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NGK Uprated HT Lead Spark Plug Cap – Hyosung GD250N GD250R

Estimated delivery dates: Aug 26, 2026 - Aug 27, 2026

£34.99

🇯🇵 NGK UPRATED HT LEAD & CAP // STABLE EFI SPARK

Essential for consistent electrical delivery and curing erratic idle tracking. This genuine upgrade piece ensures a highly stable electrical spark to remove annoying misfires, making a fresh Hyosung GD250 HT cap the single best way to protect your ignition lines during a maintenance project.

  • Resistor // Internal ceramic component deadens electrical interference to keep your fuel injection computer running smoothly.
  • Sealed // Tight internal rubber seals lock out winter rain and road dampness to prevent weak spark tracking leaks.
  • Durable // Heat-pressed construction builds immense vibration resistance to handle single-cylinder thumping easily.
  • In Stock // Ready for your next styling mod. Supplied as 1x single screw-fit connection cap piece.
💡 DIAGNOSTIC WIN: If your engine rev counter needle jumps or bounces around randomly when warm, a failing original connection head is frequently the main cause. This part is the definitive fix.
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Description

Spark plugs are absolutely as vital to your machine as fresh tires, and a high-efficiency HT cap is the final critical link in your ignition wiring system. As your bike handles everyday road use, the original factory insulation layer cracks, hardens, and breaks down internally under heavy engine heat. This slow maintenance reality allows electrical energy to bleed away before it ever reaches the cylinder head, resulting in sluggish morning starts, weak throttle pickup, and annoying mid-range hesitations. Replacing your weathered original part with this genuine Japanese aftermarket Hyosung GD250 HT cap provides exceptionally low electrical resistance. It channels maximum firing power straight into the cylinder to restore crisp engine performance during your latest restoration project.

This uprated upgrade component features premium interior ceramic materials that resist structural degradation and hold a perfectly stable resistance level under high load. This stability is highly critical for safeguarding modern fuel injection coils from electrical feedback spikes. The heavy-duty outer shell shrugs off winter moisture and road grit effortlessly, ensuring a durable firing path that resolves unprompted cutting out bugs on your daily travels.

💎 IGNITION OVERHAUL HYOSUNG GD250 HT CAP SPECIFICATIONS

Low-Resistance CoreConcentrates and boosts sparking energy to clear away engine misfires and rich fuel coughing. Ceramic EMI ShieldIntegrated resistor that blocks electromagnetic noise to protect sensitive computer sensors.
Waterproof Boot OverlaysInternal rubber seals that stop wet road spray from shorting the secondary ignition circuit. True Factory BlueprintEngineered to screw straight onto your original lead wire to replace factory codes: 33415HC8100 or 33410H98A00.

📜 Confirmed Fitment Guide

Hyosung Models: Sizing and internal terminal grips are verified strictly for the single-cylinder engines listed below. See the diagram picture for spark coil placement points.

  • Hyosung GD250N: Up to 2020.
  • Hyosung GD250R: Up to 2020.
💡 ULTIMATE IGNITION BUNDLE SUGGESTION: To ensure your fresh electrical delivery burns your fuel charge with absolute efficiency, refresh your firing pins too. Pair this uprated terminal cap along with our high-durability precious metal plugs to complete an all-weather ignition overhaul across your maintenance project. NGK LASER Spark Plugs.

🔧 Installation Tips & Advice

  • Always Reuse Your Factory Dust Boot: Remember to carefully slide your original rubber exterior shield off your old cap and mount it onto the fresh hardware during your maintenance task. Keeping this overlay in place ensures maximum protection from road grime sinking down the plug hole.
  • Trim for a Fresh Connection: When unbolting your degraded original head piece from the core wire, check the internal copper strands. We highly suggest snipping exactly 5mm off the end of your original lead cable using a sharp tool before threading the new cap on tightly to secure an absolute solid electrical link.
  • Verify the Terminal Click: Push the cap down firmly onto the tip of the plug until you hear and feel a solid mechanical snap. A loose or wobbling connection will rapidly cause internal arcing, burning out the terminal threads over time.
📧 NOT SURE HOW TO TEST YOUR IGNITION COIL PRIMARY RESISTANCE LIMITS? If your engine is popping at high speeds or you want to double-check your model variant’s electrical schematics before unboxing your order, you can upload a photo of your loom on the forum to get quick feedback. For fast sales support, email us your question or if you want to find simple troubleshooting walkthroughs, head straight over to the forums.

Additional information

Weight 0.5 kg
Dimensions 20 × 20 × 3 cm

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