NGK 6544 IMR9D-9H Laser Iridium Spark Plug for Honda VFR800F/X 2002-2021

Vehicle Fitment

• 2002-2009 Honda VFR800 Interceptor (800cc, sport touring, FWD)
• 2014-2015 Honda VFR800 Interceptor (800cc, ABS, FWD)
• 2011-2021 Honda VFR800X Crossrunner (800cc, sport touring, FWD)

Features

• Laser Iridium fine-wire center electrode for superior durability
• Platinum pad ground electrode to minimize wear
• 98 % pure copper core for excellent heat dissipation
• Trivalent metal plating for corrosion and anti-seize protection
• Taper-cut ground electrode enables efficient combustion
• Resistor design reduces ignition noise
• Pre-gapped for OEM-compatible installation
• OEM-level performance and longevity

Specifications

• NGK Part Number: 6544 / IMR9D-9H
• Thread Diameter: 10 mm (M10x1.0)
• Reach: 19 mm (3/4")
• Heat Range: NGK 9
• Seat Type: Flat with gasket
• Center Electrode: Iridium
• Ground Electrode Tip: Platinum
• Resistor: Yes (~5000 Ω)
• Pre-Gap: ~0.036" (0.9 mm)
• Hex Size: 5/8" (16 mm)

Included Components

• 1x NGK 6544 IMR9D-9H Laser Iridium Spark Plug
• 1x Crush washer gasket

Product Description

The NGK 6544 (IMR9D-9H) Laser Iridium Spark Plug is engineered as a premium ignition component for select Honda VFR800 sport-touring motorcycles. Its fine-wire iridium center electrode paired with a platinum ground pad delivers durable, consistent spark performance and long service life compared to standard plugs. The copper core and high-grade ceramic insulator promote excellent heat management and reliable combustion under varied riding conditions.

Designed to meet or exceed OEM specifications, this iridium spark plug supports improved throttle response, smoother idle, and efficient fuel burn while resisting fouling and corrosion. Always verify spark plug gap and torque values from the motorcycle service manual before installation. Fitment confirmed through 2021. 2022+ model coverage unconfirmed at time of listing.