Description
The NGK D7EA (Stock #7912) is a standard nickel spark plug designed for reliable OE-style performance in motorcycles, powersports, and select small engine applications. Built with a solid copper core, non-resistor design, and 0.7 mm pre-gap, it provides consistent ignition and efficient heat dissipation for engines that do not require resistor plugs.
Key Features
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Non-resistor design (0 Ohms) – ideal for applications requiring no electrical resistance
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OE-style nickel alloy electrode for dependable performance
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Copper core enhances heat dissipation and conductivity
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0.7 mm pre-gapped for many compatible setups
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Trivalent metal plating resists corrosion and seizing
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High-grade ceramic insulator improves strength and dielectric performance
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Triple gasket sealing helps prevent combustion gas leakage
Specifications
General
- Part Number: D7EA
- Stock Number: 7912
- Brand: NGK
- Plug Type: Nickel
- Heat Range: 7
- Resistor: No
- Resistance: 0 Ohms
- Gap: 0.7 mm
Shell / Dimensions
- Thread Size: M12 - 1.25
- Reach: 19.0 mm
- Hex Size: 18 mm
- Seat Type: Flat
- Washer Type: Crush
- Washer Included: Yes
Electrodes
- Center Electrode Core Material: Copper
- Center Electrode Tip Material: Nickel
- Center Electrode Design: Standard
- Center Electrode Projection: Non-Projected
- Ground Electrode Material: Nickel
- Ground Electrode Quantity: 1
- Ground Configuration: J-Gap
Other
- Electrical Terminal Type: Stud
- Insulator Material: Ceramic
- Insulator Height: 50.0 mm
- Grade Type: Standard Replacement
- Short Style Plug: No
Fitment Highlights
Commonly used in older motorcycles and powersports applications, including:
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BMW K100LT (1987–1992)
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BMW K100RS (1984–1988)
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BMW K75 / K75C / K75RT / K75S / K75T (1986–1995)
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Honda CB550F Super Sport (1975–1977)
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Honda CB550K (1974–1978)
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Honda TL250 (1975–1976)
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Yamaha SR185 (1981–1982)
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Yamaha TT600 (1983–1984)
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Yamaha XT550 (1982–1983)
Performance Notes
- Designed for engines that require a non-resistor spark plug
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Heat range 7 provides balanced heat dissipation for moderate to higher-load engines
- The non-projected tip matches engines designed for that configuration
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Stud terminal fits many motorcycle ignition systems
- Not interchangeable with resistor plugs unless specified—always follow OEM requirements
Summary
The NGK D7EA (7912) is a non-resistor nickel spark plug featuring a 12 mm thread, 19 mm reach, and 0.7 mm gap. It is ideal for older motorcycles and powersports equipment that require a non-resistor plug, delivering reliable ignition and durable OE-style performance.
