NGK BR9EG Racing Spark Plug

The NGK BR9EG spark plug is a resistor racing plug with heat range 9, M14 x 1.25 thread and fine-wire nickel centre electrode. Ideal for compatible karting and high-performance two-stroke engines where reliable ignition performance is required.

The NGK BR9EG (NGK stock number 3230) is a resistor-type racing spark plug designed for high-performance two-stroke and compatible motorsport engines. With a fine-wire nickel centre electrode, non-projected tip and standard ground electrode, it is built to deliver consistent spark performance under the demands of race and testing conditions. The removable terminal nut adds flexibility for different ignition system configurations, and the gasket seat ensures a secure, reliable fit in compatible cylinder heads.

In karting, spark plug selection has a direct influence on engine performance, reliability and heat management. A plug that is too hot or too cold for the application can affect power delivery, fuel combustion and engine longevity. The NGK BR9EG sits at heat range 9, making it suitable for engines that require a cooler-running plug to handle sustained high-speed operation. For mechanics and drivers setting up a kart engine for race day or testing, choosing the correct plug for the engine, fuel and operating conditions is an important part of the preparation process.

Key features:

• Resistor-type racing spark plug (approx. 5 kOhm)
• Heat range 9
• Fine-wire nickel centre electrode (1.3 mm)
• Non-projected tip
• Standard ground electrode
• Removable terminal nut
• Gasket seat type
• Recommended spark gap: approximately 0.6 mm
• Sold individually

Product details:

• Brand: NGK
• Product code: BR9EG
• NGK stock number: 3230
• Thread size: M14 x 1.25
• Thread reach: 19 mm
• Hex size: 21 mm / 13/16 inch
• Seat type: Gasket
• Overall height: ISO
• Resistor value: Approx. 5 kOhm

Compatibility note:

Spark plug suitability depends on a number of factors including the engine type, ignition system, fuel specification, carburetion and operating temperature. The NGK BR9EG is suitable for compatible karting, motorcycle, motocross, scooter and high-performance two-stroke engines, but customers should always check their engine manufacturer's recommendations before ordering. If in doubt, consult your engine manual or speak to your engine builder.

• Always verify compatibility with your specific engine before fitting
• Check the manufacturer's recommended heat range and thread specification
• Confirm the correct spark gap for your ignition system

Ideal for:

• Karting drivers and mechanics sourcing a quality racing spark plug
• Two-stroke kart engine users requiring heat range 9
• Race day preparation and engine setup
• Routine ignition maintenance and plug replacement
• Compatible motorcycle, motocross and scooter applications
• Race teams and owner-drivers looking for a reliable NGK racing plug

The NGK BR9EG is a well-established racing spark plug from one of the most trusted names in ignition components — a straightforward, quality choice for compatible engines where consistent spark performance matters.