Description
The NGK DR7EA (Stock #7839) is a standard nickel spark plug engineered for reliable OE-style performance in a wide range of motorcycle, powersports, and select automotive applications. Built with a copper core, resistor design, M12 x 1.25 thread, and 0.7 mm pre-gap, it delivers dependable ignition, solid heat dissipation, and durable everyday service.
Key Features
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OE-style nickel alloy construction for dependable performance
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Copper core improves conductivity and heat transfer
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Resistor design helps reduce electrical interference
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0.7 mm pre-gap for many compatible applications
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Trivalent metal plating helps resist corrosion and seizure
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High-grade ceramic insulator supports dielectric strength and durability
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Triple gasket sealing helps prevent combustion gas leakage
- Best suited for engines originally designed for standard nickel plugs
Specifications
General
- Part Number: DR7EA
- Stock Number: 7839
- Brand: NGK
- Plug Type: Nickel
- Heat Range: 7
- Resistor: Yes
- Resistance: 5000 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
Fits select applications including:
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BMW K100RS FL (1991–1992)
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BMW K100RS FL ABS (1991–1992)
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BMW K1100LT (1993–1998)
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BMW K1100LT High Line (1997)
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BMW K1100LT Special Edition (1997)
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BMW K1100RS (1993–1996)
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BMW K1100RS SE (1996)
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BMW M3 (1988–1991, L4 2.3L)
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BMW M5 (1988, L6 3.5L)
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BMW M6 (1987–1988, L6 3.5L)
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Suzuki C50 Boulevard (2021–2023)
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Suzuki C50T Boulevard (2021–2023)
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Suzuki M50 Boulevard (2013, 2015–2019)
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Yamaha XT250 (2008–2019)
Performance Notes
- Ideal for vehicles and machines originally equipped with nickel spark plugs
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Heat range 7 is suited for applications needing a slightly cooler operating plug than lower heat range alternatives
- The non-projected center electrode supports compatibility in engines designed for that plug style
- The stud terminal fits many motorcycle and powersports ignition setups
- Always confirm fitment by year, make, model, and engine/application
Summary
The NGK DR7EA (7839) is a nickel resistor spark plug with a 12 mm thread, 19 mm reach, 18 mm hex, and 0.7 mm pre-gap. It is a dependable OE-style replacement for select BMW, Suzuki, and Yamaha applications, offering reliable ignition and long-lasting everyday performance.
