Description
Overview:
The Genuine NGK CR9EKB Spark Plug (manufacturer part number 2305) is a high-quality resistor-type plug designed to deliver consistent ignition in high-performance petrol engines. Built by NGK, it uses a durable nickel‐alloy centre electrode with a copper core for efficient heat transfer, a strong ceramic insulator for reliable dielectric strength, and a corrosion‐resistant, nickel‐plated steel shell. The "K" configuration uses twin ground electrodes to help maintain a stable spark under demanding conditions and extend service life. With a 10 mm thread, 19 mm reach, and 16 mm spanner size, it suits many compact, high‐output engines, including popular motocross models such as the 450 SX and 505 SX. Sold individually, it is ideal for routine maintenance or replacing a worn or fouled plug.
Key Features:
- Genuine NGK part for assured quality and compatibility
- Resistor design helps reduce electrical interference and protects ignition components
- Twin ground electrodes for consistent ignition and longer service life
- Copper-core centre electrode for efficient heat dissipation and stable performance
- Robust ceramic insulator resists fouling and provides high dielectric strength
- Nickel-plated shell for corrosion resistance, especially in wet or muddy conditions
- Precision heat range (9) to suit high-performance, high-revving engines
- Standard sizing: 10 mm thread, 19 mm reach, 16 mm spanner size for easy fitting
- Factory-set gap; check and adjust to the engine's service specification
- Sold individually for straightforward one-for-one replacement during servicing
Typical Applications:
Used in high-performance single-cylinder engines where reliable cold starting, crisp throttle response, and consistent combustion are required. Common in motocross and off-road motorcycles that specify CR9EKB, including models like the 450 SX and 505 SX. Suitable for routine service intervals, resolving hard starting, misfires, or poor idle caused by worn or fouled plugs, and helping maintain fuel efficiency and engine smoothness.
Also known as:
Spark igniter, engine plug, resistor plug, dual ground electrode plug, ignition plug, NGK 2305 plug, motorcycle ignition plug.
Fits Models:
450 SX
450SX
505 SX
505SX
Alternate Part Numbers:
2305
Product Specifications
| L&S Part No. | CR9EKB |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 2305 |
| Unit of Sale | 1 |
| Fits Brands | NGK |
| Key Features | - 10 mm thread, 19 mm reach, 16 mm spanner size - Twin ground electrodes for stable spark - Copper-core electrode for efficient heat dissipation - Nickel-plated shell resists corrosion - Compatible with 450 SX, 505 SX models |
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