NGK LKAR8AI-9 Iridium Spark Plug 6706 — Single Fit for Husqvarna/Husaberg/KTM, Long-Life Ignition & Anti-Corrosion

Designed as a direct-fit, vehicle-specific replacement, the NGK 6706 (LKAR8AI-9) combines an iridium center electrode and a platinum-backed ground electrode to extend service life while preserving reliable starts and throttle response. Its construction reduces misfires and resists corrosion and seizing thanks to trivalent metal plating and robust sealing features. The plug suits off-road and street motorcycles that call for this exact heat range and thread spec.

How does this spark plug improve starting and throttle response?

The fine iridium tip produces a more concentrated, stable spark compared with conventional electrodes, which helps ignite the air–fuel mixture more consistently. That translates into faster cold and hot starts and a crisper throttle transition under load without altering your engine management.

• Laser-welded iridium center electrode for a sharper spark.
• Platinum disc on ground electrode for consistent arc stability over time.
• Corrugated insulator ribs reduce flashover for reliable ignition.

Will this plug last longer than standard plugs?

Yes — the iridium center and platinum-welded ground electrode are chosen for wear resistance, so electrical performance remains stable across more miles. The construction resists electrode erosion and helps maintain correct gap and firing characteristics longer than typical copper or nickel plugs.

• Iridium tip for high durability under repeated firing.
• Platinum backing to protect the ground electrode from rapid wear.
• Triple gasket seal prevents combustion gas leakage that can accelerate wear.

What protective features prevent corrosion and leakage?

NGK uses a trivalent metal plating on the shell to guard against corrosion and make removal easier at service intervals. Additionally, the insulator design and triple gasket seal minimize the chance of combustion gases escaping, which preserves compression and prevents premature plug failure.

• Trivalent metal plating for anti-corrosion and anti-seize performance.
• Triple gasket seal eliminates combustion gas leakage.
• Corrugated insulator ribs inhibit flashover along the porcelain surface.

Is this the correct fit for my Husaberg, Husqvarna, or KTM?

The LKAR8AI-9 is a vehicle-specific fit; it matches the thread, reach, and heat range required by the KTM, Husqvarna, and Husaberg models listed by NGK. Always confirm your motorcycle’s service manual or existing plug part number matches LKAR8AI-9 before purchase to ensure proper compatibility and avoid engine issues.

• Designed as a direct-fit replacement for specified model numbers.
• Check OEM part number or manual for confirmation.
• Sold individually — purchase quantity as needed for your engine cylinders.

Who is this for? If you own a KTM, Husqvarna, or Husaberg model that specifies an LKAR8AI-9 or NGK 6706 spark plug and you want a long-lasting, reliable ignition component that supports quick starts, steady midrange response, and reduced maintenance hassle, this plug is a practical upgrade. It's suited to riders who perform regular maintenance and want OEM-quality replacement parts that resist corrosion and wear under demanding riding conditions.