NGK Iridium Spark Plug - CR8EIX
NGK Iridium Spark Plug - CR8EIX
Couldn't load pickup availability
The NGK Iridium IX CR8EIX (4218) is a high-performance spark plug designed for enthusiasts who want to improve engine efficiency and throttle response. It features a 0.6mm fine-wire iridium center electrode that requires less voltage to spark, leading to easier starts and more stable combustion even under high-load conditions.
Key Technical Specifications
| Feature | Specification | Impact |
| Heat Range | 8 | Medium-cold; handles higher engine temperatures than standard "7" plugs. |
| Thread Size | 10mm x 19mm | Standard diameter with a 3/4" reach for many modern motorcycle heads. |
| Center Electrode | 0.6mm Iridium | Fine tip focuses electrical energy for a stronger, more consistent spark. |
| Lifespan | Up to 50,000 Miles | Significantly more durable than standard copper or nickel plugs. |
| Torque Specs | 7.2–8.7 lb. ft. | Recommended setting for installation in aluminum cylinder heads. |
Performance Benefits
-
Enhanced Throttle Response: The tapered-cut ground electrode reduces "quenching," allowing the flame kernel to grow faster and more reliably.
-
Anti-Fouling Design: The special thermo-edge design reaches self-cleaning temperatures quickly, preventing carbon buildup during stop-and-go city riding.
-
Fuel Efficiency: Improved combustion efficiency helps the engine extract more energy from every drop of fuel, leading to smoother idling and potential mileage gains.
-
Corrosion Resistance: Features trivalent metal plating to provide superior anti-seizing properties, ensuring the plug won't get stuck in the head over time.
Popular Compatibility & Fitment
The NGK CR8EIX is a widely compatible performance upgrade for many popular motorcycles:
-
Yamaha: R3, MT-03, and the YZ250F / YFZ 450 off-road range.
-
Royal Enfield: Interceptor 650 and Continental GT 650 (often paired as a dual-plug set).
-
Kawasaki: Ninja 250R/300, Z300, and Versys-X 300.
-
Bajaj/KTM: Center spark plug for the Pulsar NS200, RS200, Dominar 400, and Duke 250.
-
Benelli: TNT 300, 502C, and TRK 502/X models.
Share
