High-performance standard racing spark plug featuring a fine-wire 1.3mm nickel alloy center electrode, engineered to withstand extreme racing conditions while offering improved ignitability over a conventional standard plug. Built with a solid 98% pure copper core for enhanced heat dissipation, trivalent metal plating for superior anti-corrosion and anti-seizing properties, a built-in resistor, a non-projected tip design tailored for high-output applications, and a solid terminal configuration to resist vibration loosening.
Specs & Details
- Stock Number: 3992
- Part Number: BR8EG (Solid)
- Thread Size: M14 - 1.25
- Reach: 19.0 mm (0.750 in)
- Seat Style: Gasket (Flat)
- Heat Range: 8
- Resistor Type: Resistor (5,000 Ohms)
- Terminal Type: Solid Terminal (Non-Removable Nut)
- Electrode Material: Fine-wire (1.3mm) nickel alloy center electrode (Copper core)
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Kawasaki | KX 500 | Two-Stroke Motocross | 1988–2004 |
| KTM | 200 / 250 / 300 EXC & XC-W | Two-Stroke Enduro | 1998–2010s |
| Yamaha | YZ 250 / YZ 250X | Two-Stroke Motocross / Cross-Country | 1990s–Present |
| Honda | CR 250R / CR 500R | Two-Stroke Motocross | 1980s–2000s |
TSO Garage Note: A medium-cold heat range (8) fine-wire nickel racing plug with a solid terminal nut. This is the exact solid-terminal equivalent to stock #3130 (the standard BR8EG), making it ideal for high-vibration, large-displacement two-strokes like the KX500 and big-bore KTMs where removable nuts can rattle loose. The "G" indicates a fine-wire (1.3mm) nickel center electrode, which requires less voltage to fire than a standard 2.5mm electrode and reduces the quenching effect for a better spark. This makes it highly resistant to fouling in high-revving dirt bikes without stepping up to a costlier iridium plug.
Compatibility
Fetching compatibility details...
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