Type / Technology: Platinum center electrode, with a fine wire center electrode and a platinum ground electrode, for improved durability and lifespan.
Heat Rating: 8 (mid / standard for many engine uses)
Resistor: Yes — it includes a resistor of about 5 kΩ to suppress electrical noise to electronics.
Thread / Physical Dimensions:
• Thread diameter: M10 × 1.0 mm
• Thread reach (length): 19 mm
• Spanner (wrench) size: 16 mm
• Spark gap: ~0.7 mm
Applications & Use:
• Suitable for various small/medium engines — often used in motorcycles, scooters, and small displacement bikes.
• It is a “plug & play” replacement when the OEM calls for a PMR8B or equivalent.
Benefits / Notes:
• The platinum tip extends service life over conventional copper plugs.
• The resistor helps suppress radio / electronic interference.
• Because of the fine wire electrode, the spark energy is more concentrated, which can help in hard starting or lean mixes.
• Must be installed/torqued properly — under- or over-tightening affects heat transfer and may damage threads.
Torque ranges (for 10 mm thread) are about 7.2 to 10.8 lb-ft for cast iron, 7.2 to 8.7 lb-ft for aluminum heads per NGK’s guidelines on typical 10 mm plugs.
