Standard OE-approved copper core spark plug featuring a solid 98% pure copper core for enhanced heat dissipation, wider heat ranges, and trivalent metal plating for superior anti-corrosion and anti-seizing properties. Built with a built-in resistor and a non-projected tip design to suppress electrical interference and handle high-rpm combustion pressures.
Specs & Details
- Stock Number: 4234
- Part Number: BR9ES
- 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)
- Electrode Material: Nickel alloy
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 125 | Two-Stroke Motocross | 1999–Present |
| Honda | CR 125R | Two-Stroke Motocross | 2000–2007 |
| Suzuki | RM 125 | Two-Stroke Motocross | 2001–2008 |
| Kawasaki | KX 125 | Two-Stroke Motocross | 2000–2008 |
TSO Garage Note: An extreme cold-heat-range (9) non-projected tip resistor plug widely specified as OEM standard equipment for modern high-revving 125cc two-stroke motocross engines operating under aggressive race conditions.
Compatibility
Fetching compatibility details...
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