The NGK 4549 Standard Nickel spark plug is a replacement plug for 1968-2025 KYMCO, Honda, Kawasaki and other makes. It has M10-1.0 threads, a 0.500 in. reach, a 5/8 in. (16 mm) hex and a heat range of 7. Its nickel alloy center electrode and copper core follow the original equipment design for engines that came with nickel plugs.

NGK 4549 Standard Nickel Spark Plug Features:

• Fits 1968-2025 KYMCO, Honda, Kawasaki and Other Makes; see Fitment tab for all applications
• M10-1.0 metric thread with 0.500 in. reach
• 5/8 in. (16 mm) hex
• Flat seat with crush washer installed
• Heat range 7
• 0.028 in. factory pre-gap
• Nickel center electrode tip with nickel ground electrode tip
• Resistor type (5000 ohm) for ignition noise suppression
• Stud terminal
• 1.880 in. insulator height
• Nickel alloy center electrode built to the original equipment design
• Copper core center electrode draws heat away from the firing end
• Alumina silicate ceramic insulator for high dielectric strength
• Trivalent metal plating resists corrosion and thread seizing
• Rolled threads help prevent cross-threading in the cylinder head
• Intended for engines that originally used nickel alloy plugs, not as a replacement for factory precious metal plugs