High-performance iridium alloy spark plug engineered for exceptional durability, stable high-RPM spark, and superior anti-fouling characteristics. Features an ultra-fine 0.6mm iridium center electrode and a tapered-cut, low-angled ground electrode designed to maximize flame kernel expansion. Built with trivalent metal plating for advanced anti-corrosion and anti-seizing performance, a built-in resistor, a non-projected tip design, and a standard removable terminal nut.
Specs & Details
- Stock Number: 5438
- Part Number: BR9ECSIX
- Thread Size: M14 - 1.25
- Reach: 19.0 mm (0.750 in)
- Seat Style: Gasket (Flat)
- Heat Range: 9
- Resistor Type: Resistor (5,000 Ohms)
- Terminal Type: Removable Nut
- Electrode Material: Iridium fine-wire center electrode (0.6mm) with a tapered ground electrode
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 125 | Two-Stroke Motocross | 1990s–Present |
| Honda | CR 125R | Two-Stroke Motocross | 1980s–2007 |
| Kawasaki | KX 125 | Two-Stroke Motocross | 1990s–2008 |
| Various | High-Output Modern Two-Stroke Motocross / Track Builds | Motocross / Competition | Select Years |
TSO Garage Note: A cold heat range (9) fine-wire iridium upgrade featuring a standard 19mm reach and a removable terminal nut. The BR9ECSIX bridges the gap between standard fine-wire racing plugs and long-life iridium tech, offering exceptional fouling resistance for high-revving 125cc two-stroke motocross engines that spend extended time idling or transitioning through the mid-range on the pipe.
Compatibility
Fetching compatibility details...
| Year | Make | Model |
|---|---|---|
