NGK Laser Iridium spark plug IFR9H11, part number 6588.

• Fine iridium tip for high durability and a consistently stable spark
• Iridium alloy with an extremely high melting point for high-tech, high-performance engines
• Trivalent metal plating for superior anti-corrosion and anti-seizing properties
• 98% pure copper core aids in heat removal
• Pure alumina silicate ceramic insulator provides superior strength and better heat transfer
• Triple seals prevent leakage
• Ultra-small-diameter center electrode reduces voltage requirement and extends ignition system life
• Metal shell plating has enhanced anticorrosion qualities
• Cold-rolled threads
• Center electrode: fine wire, projected
• Electrode tip material: iridium
• Ground electrode: single, taper cut
• Thread size: 14 mm
• Spark gap: 0.043 in
• Electrical resistance: 5k Ohms
• Heat range: 9
• Terminal: solid terminal
• Type: resistor

Fits the following:

• Honda CRF450R: 2002-2018
• Honda RVT1000R RC51: 2002-2006