NGK BR7ES Spark Plug – Stock No. 5122
A reliable NGK resistor spark plug for performance and everyday use. It gives consistent ignition, resists fouling, and handles heat well. Ideal for many bikes, powersports engines, karts, and classic applications that use an M14 gasket-seat plug with 19 mm reach. Use the vehicle lookup to confirm fitment, or check the Vehicle Fitment tab.
- Stable spark and smooth running under load
- Resistor design helps reduce electrical noise that can affect ECUs
- Copper core for better heat control and durability
| Part Number | BR7ES |
| NGK Stock Number | 5122 |
| GTIN | 087295151228 |
| Category | 686 – Spark Plug |
| Thread Diameter | M14 |
| Thread Pitch | 1.25 |
| Reach (thread length) | 19 mm |
| Hex Size | 20.8 mm |
| Seat Type | Flat seat with gasket |
| Heat Range | 7 (NGK scale) |
| Resistor | Yes |
| Centre Electrode | Copper core with nickel alloy tip |
| Ground Electrode | Nickel alloy |
| Projected Tip | No |
| Terminal Type | Removable terminal nut |
| Factory Gap | 0.7 mm (adjust to vehicle spec) |
| Insulator | Alumina ceramics with anti-fouling ribs |
| Plating | Trivalent anti-corrosion |
Fitting notes
Set the gap to your engine spec with a feeler gauge. Thread in by hand first to avoid cross-threading. Tighten to the vehicle maker’s torque spec. Do not over-tighten. Replace as a full set on multi-cylinder engines for best results.
The price displayed is for a single plug, please add the desired amount to your basket.




