Description
The NGK CR9EH-9 (Stock #7502) is a high-performance, resistor-type nickel spark plug designed for motorcycles and powersports engines that require a compact 10mm thread and colder heat range (9). Featuring a 0.9 mm pre-set gap, copper core, and nickel electrode, it delivers reliable ignition and effective heat dissipation for higher-revving engines.
Key Features
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OE-style nickel spark plug for consistent performance
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Colder heat range (9) suited for high-performance engines
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Copper core for excellent conductivity and heat transfer
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5k ohm resistor reduces electrical interference
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0.9 mm pre-gapped for compatible applications
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Trivalent metal plating resists corrosion and seizing
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High-grade ceramic insulator ensures strong dielectric performance
- Designed for engines originally using standard nickel plugs
Specifications
General
- Part Number: CR9EH-9
- Stock Number: 7502
- Brand: NGK
- Plug Type: Nickel
- Heat Range: 9
- Resistor: Yes
- Resistance: 5000 Ohms
- Pre-Gap Size: 0.9 mm
- Grade Type: Standard Replacement
Shell
- Thread Size: M10 x 1.0
- Thread Type: Metric
- Seat Type: Flat
- Reach: 19.0 mm (approx. 12.7 mm threaded reach noted)
- Hex Size: 5/8" (16 mm)
- Washer Type: Crush
- Washer Included: Yes
Center Electrode
- Core Material: Copper
- Tip Material: Nickel
- Design: Standard
- Projection: Non-Projected
- Insulator Tip Projection: 0.06 in / 1.65 mm
Ground Electrode
- Configuration: J-Gap
- Quantity: 1
- Core Material: Nickel
- Tip Material: Nickel
- Tip Design: Standard
Other
- Electrical Terminal Type: Stud
- Insulator Material: Ceramic
- Insulator Height: 48.9 mm
- Resistor Type: Yes
- Short Style Plug: No
- Metallurgy: Copper
Fitment Overview
Primarily used in Honda motorcycles and performance-oriented engines.
Common applications:
- Honda CB600F 599 (2004, 2006)
- Honda CB650F / CB650F ABS (2018)
- Honda CBR600F F2 / F3 / F4 (1991–2000)
- Honda CBR650F / ABS (2014–2018)
- Honda CRF150R / CRF150R Expert (2020)
- Honda NX250 (1988–1990)
Performance Notes
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Heat range 9 = colder plug, ideal for high-performance or high-RPM engines
- Must match OEM spec—using too cold a plug can cause fouling in low-load use
- Always verify gap and torque spec before installation
Summary
The NGK CR9EH-9 (7502) is a compact, resistor-type nickel spark plug with a 0.9 mm gap, M10 x 1.0 thread, and cold heat range (9). It’s a reliable OE replacement for sport bikes and high-revving motorcycle engines, especially in Honda applications.
