Description
The NGK CR9EB (Stock #6955) is a resistor-type nickel spark plug built for dependable OE-style performance in motorcycles and powersports applications. It features a solid terminal, non-projected tip, and heat range 9, making it well suited for high-performance and high-heat engines that require consistent ignition and reliable durability.
Key Features
-
OE-style standard nickel spark plug for reliable everyday performance
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5kΩ resistor helps reduce electrical interference
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Solid copper core improves heat transfer and conductivity
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Trivalent metal plating resists corrosion and helps prevent seizure
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Non-projected center electrode for applications requiring that design
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Crush washer seat ensures proper sealing in flat-seat cylinder heads
Specifications
General
- Part Number: CR9EB
- Stock Number: 6955
- Heat Range: 9
- Resistor: Yes (5000 Ohms)
- Gap: 0.8 mm
Shell
- Thread Size: M10 x 1.0
- Reach: 19.0 mm
- Seat Type: Flat
- Hex Size: 5/8" (16 mm)
- Terminal Type: Non-removable nut / solid terminal
- Washer Type: Crush
Electrodes
- Center Electrode Material: Nickel
- Ground Electrode Material: Nickel
- Ground Electrode Quantity: 1
- Center Electrode Design: Standard
- Projection: Non-projected
- Ground Configuration: J-gap
Construction
- Insulator Material: Ceramic
- Core Material: Copper
- Metallurgy: Copper
- Insulator Height: 50.8 mm
Common Applications
Aprilia
- RSV4 Factory (2010)
- RSV4 Factory SE (2011)
- RSV4 R (2010–2011)
Harley-Davidson
Fits a wide range of modern Harley-Davidson Touring, Softail, Trike, CVO, and Street models, including:
- Road King / Road King Special
- Street Glide / Street Glide Special / Street Glide ST
- Road Glide / Road Glide Special / Road Glide ST / Road Glide Limited
- Ultra Limited / Electra Glide / Tri Glide Ultra / Freewheeler
- Fat Boy 107 / Fat Boy 114
- Heritage Classic 107 / 114
- Street Bob 107 / 114
- Breakout 107 / 114 / 117
- Fat Bob 107 / 114
- Low Rider / Low Rider S / Low Rider ST
- Softail Standard 107
- XG500 Street 500
- XG750 Street 750
- XG750A Street Rod
Performance Notes
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Heat range 9 is on the colder side, appropriate for hotter-running performance engines
- Best used as a direct replacement for OE nickel plug applications
- Resistor design helps reduce ignition noise and interference
- Non-projected tip suits engines designed around that combustion chamber layout
- Always verify fitment, gap, and torque specs before installation
