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The NGK 5129 Spark Plug (DPR7EA-9) is a high-performance copper-core plug designed for Harley-Davidson motorcycles, offering reliable ignition, strong combustion, and excellent heat transfer for smooth-running V-twin engines.
🔧 Copper core provides optimal spark energy and heat dissipation🔧 Nickel alloy electrode resists wear and carbon buildup🔧 Trivalent metal plating protects threads from corrosion🔧 Built to handle vibration and high-load engine cycles
Brand & Part Number: NGK 5129 DPR7EA-9Material: CopperThread Size: 12mmReach: 19mm (0.75 in.)Hex Size: 18mm (11/16 in.)Seat Type: GasketResistor: YesGap: 0.036 in. (0.9mm)
Choose NGK DPR7EA-9 for strong, reliable ignition and lasting performance in your Harley-Davidson—order now!