NGK C8E Spark Plug – Stock No. 7471
The NGK C8E is a non-resistor spark plug for high temperature use. It suits many classic two-stroke motorcycles and small engines that take a 10 mm, long-reach plug. It offers reliable ignition under hard use and helps resist fouling.
- Strong, consistent spark for easier starts and smoother running
- Heat range 8 for high load or sustained high rpm use
- Nickel alloy electrode with copper core for dependable performance
| Part Number | C8E |
| NGK Stock Number | 7471 |
| GTIN | 87295174715 |
| Category | 686 – Spark Plug |
| Thread Diameter | 10 mm |
| Thread Reach | 19 mm (long reach) |
| Seat Type | Flat seat with gasket |
| Hex Size | 16 mm |
| Resistor | No (non-resistor) |
| Heat Range | 8 (cold) |
| Electrode Material | Nickel alloy with copper core |
| Ground Electrode | Single |
| Projected Tip | No |
| Factory Gap | 0.6 mm (adjust as specified by the engine manufacturer) |
| Terminal Type | Solid terminal |
| Typical Tightening Torque | 10-12 Nm (10 mm plug with gasket) |
Fitment Guidance
This plug fits engines designed for a 10 mm thread, 19 mm reach, non-resistor plug in heat range 8. Common on many older two-stroke motorcycles and small engines. Use the vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
Important: Always set the gap and torque to the engine maker’s spec. Do not over-tighten.
The price displayed is for a single plug, please add the desired amount to your basket.

