NGK 91320 DPR7EA-9 BLYB Standard Spark Plug, Copper Core, 12mm

The NGK 91320 Standard spark plug (service number DPR7EA-9 BLYB) is a copper core, resistor-type spark plug. It is made for motorcycles, ATVs, scooters and other powersports engines that use a nickel alloy OE plug. NGK is a major original equipment spark plug supplier, and the Standard line is sold in the familiar NGK yellow box packaging.

Key Features:

• Solid copper core: Gives good heat dissipation, conductivity and a broad heat range.
• OE ceramic technology: The high-grade alumina silicate ceramic insulator provides strong dielectric performance.
• Cold-rolled threads: Help prevent cross-threading and damage to the cylinder head.
• Trivalent metal plating: Resists corrosion and seizing, which makes installation and removal easier.
• Resistor design: 5,000 ohm resistance helps suppress radio frequency interference.

Specifications:

• Heat range: 7
• Thread diameter: 12 mm (0.472 in.)
• Reach: 19 mm (0.750 in.)
• Hex size: 18 mm
• Seat type: Flat (gasket/crush washer)
• Pre-gap: 0.036 in. (0.9 mm)
• Insulator height: 50 mm
• Center electrode: Copper core with nickel tip
• Ground electrode: Nickel, standard design, single electrode
• Terminal type: Stud

This plug is best suited to engines that came with OE nickel alloy plugs. It is not recommended for engines with factory precious metal plugs. For more performance, NGK suggests an Iridium IX plug.

Cross-references: Bosch XR5DC, Bosch XR7LDC, Champion 449, Champion RAX96YC.