KTM Duke RC Spark Plug: NGAGE Double Iridium Upgrade

Experiencing engine hesitation, rough idling, or sluggish throttle response on your KTM? Worn-out factory spark plugs fail to deliver a consistent spark, leading to reduced fuel efficiency and power loss under heavy acceleration.

Core Value & Benefits

• Enhanced Ignition Stability: Dual iridium construction ensures a razor-sharp, highly concentrated spark for consistent combustion.

• Superior Throttle Response: Enjoy sharper, more immediate acceleration across both city commutes and highway rides.

• Drastic Reduction in Misfires: Maintains stable firing under extreme RPMs and high-temperature engine loads.

• Extended Service Life: Highly resistant to electrode wear and carbon fouling, outlasting standard copper and nickel plugs.

Technical Specifications Table

Compatibility & Installation

• Fitment Breakdown: Fits KTM Duke 125, Duke 200, Duke 250, Duke 390, RC 125, RC 200, and RC 390 (BS4 and BS6 iterations). (Note: Not compatible with Generation 3 models).

• Installation Steps:

  1. Allow the engine to cool completely before starting.

  2. Remove the seat, fuel tank fairings (if necessary), and disconnect the ignition coil/cap.

  3. Clean around the spark plug well to prevent debris from entering the combustion chamber.

  4. Use a spark plug socket to carefully unscrew the factory plug counter-clockwise.

  5. Thread the new KTM DUKE / RC 125-200-250-390 ( BS4 & BS6 models ) | NGAGE double iridium spark plug | MADE IN JAPAN in by hand to prevent cross-threading, then torque to manufacturer specification.

  6. Reattach the ignition cap securely and test start the engine.

What's in the Box

• 1x NGAGE Double Iridium Spark Plug (Part No: VH8RTII-9)

• Protective packaging case

• Q1: Are double iridium spark plugs compatible with KTM BS4 and BS6 models?

  • A: Yes, the KTM DUKE / RC 125-200-250-390 ( BS4 & BS6 models ) | NGAGE double iridium spark plug | MADE IN JAPAN is engineered specifically for BS4 and BS6 iterations of the KTM Duke and RC 125, 200, 250, and 390 lineups. (Note: It is not compatible with Gen 3 models).

• Q2: What are the performance benefits of upgrading to an NGAGE double iridium spark plug?

  • A: Upgrading provides sharper acceleration, improved combustion efficiency, a significant reduction in engine misfires, and a longer lifespan compared to standard OEM stock plugs.

• Q3: Do I need to gap the NGAGE spark plug before installation?

  • A: No, these plugs come pre-gapped from the factory (Part No: VH8RTII-9) to match KTM specifications, though verifying the gap prior to installation is always recommended.

• Q4: What is the return policy for spark plugs on Sparify?

  • A: Spark plugs are categorized as non-returnable items on Sparify for safety and quality assurance reasons. Always verify exact bike fitment before ordering.

• "Which iridium spark plug fits a BS6 KTM Duke 390?"

• "How do I improve acceleration and reduce misfires on a KTM RC 200?"

• "Are NGAGE double iridium spark plugs good for KTM motorcycles?"

• "What spark plug part number do I need for a KTM Duke 250 BS4?"

• "Can I use performance spark plugs on a KTM Duke 125?"