NGK LMAR9AI-10 Iridium Spark Plug – 93188

The NGK LMAR9AI-10 is a high-performance iridium spark plug designed to improve ignition efficiency and extend service life. It features a fine-wire 0.6mm iridium center electrode for a strong, focused spark and consistent combustion. The tapered ground electrode helps reduce quenching, and the insulator is built to withstand the heat and vibration common in modern high-revving engines.

This plug is a common upgrade over standard copper plugs for motorcycles, scooters, and lightweight sport bikes. Ideal for riders looking for better throttle response, smoother starts, and longer intervals between changes.

Features:

• Laser-Welded Iridium Electrode: The ultra-fine iridium center electrode ensures a highly focused spark, drastically reducing the voltage requirement placed on the ignition coil and preventing misfires under heavy engine loads.

• Superior Anti-Fouling: Features an advanced alumina silicate ceramic insulator and specialized thermo-edge design that prevents carbon buildup and wet-fouling during low-speed, technical riding.

• Extended Service Life: The extreme melting point of iridium minimizes electrical wear and electrode degradation, offering much longer intervals between plug changes compared to standard OEM plugs.

• Crisper Throttle Response: A more complete and efficient combustion cycle yields immediate roll-on power and a smoother idle.

• Trivalent Metal Plating: The threaded body features NGK's proprietary anti-corrosion and anti-seizing plating, protecting delicate aluminum cylinder heads during installation and removal.

Specs:

• Thread Size: 10mm x 1.0mm

• Reach: 26.5mm

• Hex Size: 14mm wrench

• Heat Range: 9 (NGK scale)

• Electrode Material: Iridium

• Resistor Plug: Yes

• Solid terminal
  
  

• NGK Part Number: 93188

Common Fitment:

• 2019–2020 – KTM 790 Adventure   **Torque: 10–12 Nm (7.4–8.9 ft-lbs)

• 2021–2026 – KTM 890 Adventure  **Torque: 10–12 Nm (7.4–8.9 ft-lbs)

• 2014–2026 – KTM 250 - 500 EXC-F 

• 2014–2025 – KTM 250 - 500 XCF-W

• 2022–2026 – Husqvarna Norden 901

• 2014–2026 – Husqvarna FE 250 - 501

• 2025–2026 –KTM 790 Adventure

• And several other models

Always verify fitment with your motorcycle’s
service manual before installation.
Email us at TMBRMOTO@TMBRMOTO.COM
if you have any questions

Part Number: 93188