Register

NGK Uprated HT Lead Spark Plug Caps (x2) – Hyosung GV125-S EFi Bobber 125 S

Estimated delivery dates: Sep 7, 2026 - Sep 8, 2026
1 review

£67.99

⚡ NGK RACING HT LEAD & CAP UPGRADE // THE ULTIMATE GV125-S IGNITION ALLY

Need a stronger, cleaner spark on your GV125-S EFI? This genuine race-spec spark plug cap from NGK comes with an integrated wire line, giving your ignition setup an essential upgrade. Swapping out leaky factory caps for this premium GV125-S ignition lead pack is the most reliable way to clear up wet-weather splutters on local roads.

  • Stability // Built with an internal ceramic core that prevents heat-soak power drops under heavy engine usage.
  • Endurance // Heavy rubber barriers engineered to absorb harsh motor vibrations on high-revving twins.
  • Throttle // Maintains a constant electric arc at high engine speeds for a sharp, smooth response.
  • Hardware // Package contains two (2x) factory NGK red wires with matching plug boots to fully refresh both cylinders.
📺📸 SEE THE PROOF: Check out the customer photos and videos in the gallery on this page to see these red leads in action!

👍 Plenty of owners have fixed heavy misfires by binning the cheap factory caps for these premium Japanese NGK units.

Secure Checkout via

Description

On the fuel-injected GV125-S Bobber engine, your main ignition coils and plug leads hang right out in the open elements. The reality of maintaining these bikes is that the standard factory-fitted caps from China are prone to serious water leaks. This moisture ingress makes your motor cough, splutter, or completely die in heavy rain. It is often the primary reason behind stubborn engine misfires, which can cook your expensive blackbox coils if left unfixed. Upgrading your ignition network to this genuine aftermarket GV125-S ignition lead pack is the definitive solution. Featuring high-visibility red cables and race-spec internal ceramic resistors, they hold an incredibly steady electrical current even under high engine temperatures. This ensures your cruiser runs exactly as sharp as it looks, completely ruling out weak factory parts on local roads.

💎 RACING HARDWARE GV125-S IGNITION LEAD SPECIFICATIONS

Genuine Japanese EngineeringManufactured to strict standards for maximum electrical flow and zero spark energy loss. Total Weather SealingThick rubber boot skirts designed to block downpours and puddle splashes completely.
Anti-Heat Ceramic ResistorMaintains a constant signal value to stop top-end misfiring when sitting in heavy traffic. Simple Screw ConnectionThe copper core twists straight onto the original factory spike pins inside your coil body.

📜 Confirmed Fitment Guide

Fuel Injected V-Twin Bobber Group: This kit is for the models listed below. See our customer pictures for cylinder routing.

  • Hyosung GV125-S Aquila Bobber EFi: Fits all injection variants built from 2018 to present date.
🛠️ FACTORY CROSS MATCH PLACEMENT:

This aftermarket twin wire pack is engineered to completely replace original parts matching factory codes: 33401KG7200 or 33401HG7200.

💡 THE ULTIMATE IGNITION COMBO: Maximize your running performance and engine combustion gains by pairing these high-output lines along with premium plugs. Screw these leads in along with our NGK Laser Spark Plugs to guarantee the absolute strongest spark possible across your combustion chambers. View Laser Spark Plugs here.

🔧 Install Tips

  • The Clockwise Twist Method: To drop your old weathered wire line out of the plastic coil body, simply grab the boot base and unscrew it anti-clockwise. To connect your fresh red NGK line, push it firmly down onto the inner metal spike inside the port and twist it clockwise until the thread locks tight.
  • Save Your Factory Seals: You must carefully slide the original rubber water and dust cover boots off your old factory cable lines and onto your new NGK leads before you twist them into the coils. Keeping these rubbers in place is absolutely vital to keeping the coil bodies dry and alive!
  • Grease the Cap Base: Apply an incredibly small smear of specialized dielectric grease directly onto the inside of the spark plug cap rubber. This helps repel road water and stops the boot material from binding or baking hard onto the spark plug body over time.
📧 NOT SURE IF YOUR BOBBER IS RUNNING ON ONE CYLINDER AFTER A RAIN SHOWER? If your exhaust pipe stays cold on one side or you want to verify your ignition coil paths before unboxing, you can upload a crisp photo of your spark lines on the forum to get quick help from other owners. For fast sales support, email us your question or if you want to find easy repair writeups, head straight over to the forums.

Additional information

Weight 1 kg
Dimensions 30 × 20 × 4 cm

1 review for NGK Uprated HT Lead Spark Plug Caps (x2) – Hyosung GV125-S EFi Bobber 125 S

  1. Lokutes

    Get these NGK HT Leads everyone, in Combination with the Laser Iridium Spark Plugs, it makes a difference, she runs a lot smoother, better Throttle control and idle

Share Your Feedback

GARAGE PICKS // ADD TO BUILD


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.