NGK CR6HSB Spark Plug (Stock No. 6500) – Reliable 10 mm, Resistor Plug for Small-Capacity Engines
The NGK CR6HSB is a compact, resistor-type spark plug designed for clean combustion and consistent ignition. It suits many small-capacity motorcycles, scooters, ATVs, and other engines that use a 10 mm gasket-seat plug. It helps cold starts, smooth idle, and steady performance without fuss.
- Stable spark for easier starting and smoother running
- Resistor design to reduce electrical noise in the ignition system
| Part Number | CR6HSB |
| NGK Stock Number | 6500 |
| GTIN | 087295165003 |
| Category | 686 – Spark Plug |
| Thread Diameter | 10 mm |
| Thread Pitch | 1.0 mm |
| Reach (Thread Length) | 12.7 mm (1/2 in) |
| Hex Size | 16 mm |
| Seat Type | Flat seat with gasket |
| Heat Range | 6 (NGK scale) |
| Resistor | Yes |
| Centre Electrode | Nickel alloy |
| Ground Electrode | Nickel alloy, standard |
| Tip Projection | Non-projected |
| Terminal Type | Solid terminal (non-removable) |
| Factory Gap | 0.7 mm (check and adjust as required) |
| Washer | Sealing gasket included |
Fitment guidance
Common on many small-capacity bikes, scooters, and utility engines that specify a 10 mm, 12.7 mm reach, gasket-seat plug. Use our vehicle lookup or check the Vehicle Fitment tab to confirm.
Installation notes
Check the gap before fitting. Tighten to the correct torque for a 10 mm gasket-seat plug (typically around 10-12 Nm on an aluminium head). Recheck after initial heat cycle. Do not over-tighten.
The price displayed is for a single plug, please add the desired amount to your basket.


