NGK BCR8ES Spark Plug – Stock No. 5430
The NGK BCR8ES is a reliable, cold-heat-range spark plug for hard-working engines. It gives a strong, consistent spark and handles high temperatures well. Ideal for tuned or high-revving applications where a cooler plug is recommended.
It uses a resistor to cut electrical noise, which helps protect sensitive electronics like the ECU. The standard nickel centre electrode with a copper core offers dependable performance and good heat dissipation.
- Cold heat range (8) – helps prevent knock and pre-ignition in high-load use
- Resistor design – reduces radio interference and protects electronics
- Gasket seat – secure seal and consistent heat transfer
Technical Specifications
| Part Number | BCR8ES |
| NGK Stock Number | 5430 |
| GTIN | 087295154304 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Reach | 19 mm |
| Hex Size | 20.8 mm (13/16 inch) |
| Seat Type | Flat seat with gasket |
| Resistor | Yes |
| Heat Range | 8 (NGK scale – cold) |
| Centre Electrode | Nickel alloy with copper core |
| Ground Electrode | Standard |
| Projected Tip | No |
| Factory Gap | Approx. 0.7 mm (adjust as required) |
Fitment Guidance
This specification is common in many performance two-stroke motorcycles and marine/powersport engines that require a 14 mm thread, 19 mm reach, gasket seat, and a cold heat range. Use the site’s vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
Note: Always check and set the gap to your engine’s specification. Avoid overtightening – follow the manufacturer’s torque guidance.
The price displayed is for a single plug, please add the desired amount to your basket.


