Name: NGK Racing HT Coil Spark Plug Cap Cover [x1] - Hyosung RT125 RX125 MS3-250
SKU: 33500H88412-RT
Availability: InStock

NGK Racing HT Coil Spark Plug Cap Cover [x1] – Hyosung RT125 RX125 MS3-250

Estimated delivery dates: May 5, 2026 - May 6, 2026

£19.99

🏁 NGK RACING HT COIL CAP | SINGLE CYLINDER RELIABILITY

Stop hot-running misfires. The stock caps are prone to failure, causing jerking or surging between revs. This genuine NGK Uprated Cap provides a consistent, high-power spark even when hot, ensuring your single-piston runs smoothly.

✅ Fixes Hesitation: Eliminates inconsistent running caused by a failing cap.
🛠️ Trusted Brand: Genuine Japanese NGK quality vs. generic Chinese caps.
⚙️ EPDM Rubber Build: Rugged, heat-resistant, and vibration-proof design.
📦 Sold Individually (x1): Everything you need for the single-cylinder engine.

💡 THE PERFORMANCE WIN:
This cap runs cooler and is moisture-proof, designed to maintain steady resistance over time—a crucial upgrade for the exposed engine area.

Description

Spark plugs are essential, but the HT Coil Spark Plug Cap is the vital link that ensures a reliable electrical flow, even when your engine runs hot. Standard OEM caps are prone to wear, which can lead to performance issues and frustrating misfires.

Common symptoms of a faulty OEM cap include engine surging, an unsteady RPM needle, or a boggy exhaust note, especially during hotter running conditions.

💎 Trusted NGK Reliability

This NGK upgrade is made with high-grade ceramic and phenolic resin for outstanding heat and tension resistance.

Runs Cooler Withstands higher engine temperatures.	Moisture-Proof Heat press insertion and rubber liners prevent electrical leakage.
Improved RPM Performance Faster cold starts and stable revs.	Vibration Resistant Durable outer shell designed for single-cylinder rattle.

📜 Confirmed Fitment:

Reference OEM Part Numbers: 33500H88412, 33500HP9500, etc.

RX125 / XRX125

RT125 / RT125D

MS3-250 (Scooter)

🔧 Installation Tips & Advice

Installation is “swap & go,” but a clean fit ensures optimal performance:

**Clean Connections:** Clean the plug top and coil terminal thoroughly before fitting.
**Inspect HT Lead:** Check the main high-tension lead wire for cracks or wear – replace if needed.
**Secure Fitment:** Push the cap on firmly until fully seated.
**Need Help?** Visit our Help Forums for step-by-step guidance.

📧 SALES ENQUIRY? Email us for direct product questions.