Description
The NGK BPMR6A is a compact, short-style standard spark plug designed for small engines and powersports equipment. Built with NGK’s proven copper-core construction and durable nickel electrodes, it delivers reliable ignition, efficient heat control, and long-lasting performance in demanding conditions.
With a 0.7 mm pre-gap and solid terminal, it’s ideal for applications requiring a secure, fixed connection and consistent spark.
Key Features
-
OEM-quality nickel electrode for dependable ignition
-
98% copper core for superior heat dissipation
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Trivalent metal plating resists corrosion and prevents seizing
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Triple gasket sealing prevents combustion leakage
- Durable alumina silicate ceramic insulator
-
Short-style plug for compact engine designs
- Pre-gapped at 0.7 mm
Specifications
General
- Part Number: BPMR6A (Solid)
- Stock Number: 4972
- Heat Range: 6 (medium)
- Resistor: Yes (5k Ohm)
- Gap: 0.7 mm
Shell
- Thread Size: M14 x 1.25
- Seat Type: Flat (crush washer)
- Reach: 9.5 mm
- Hex Size: 3/4" (19 mm)
- Terminal Type: Solid / Non-removable
- Style: Short plug
Electrodes
- Center Electrode: Nickel
- Ground Electrode: Nickel
- Configuration: J-gap
- Projection: Mid projection
Fitment Highlights
Powersports
- Sherco ST Racing series
- 125 ST Racing (2023–2024)
- 250 ST Racing (2023–2024)
- 300 ST Racing (2023–2024)
Typical Applications
- Trials bikes
- Small displacement engines
- Outdoor power equipment (when specified)
Performance Notes
-
Heat range 6: balanced for general-purpose small engine use
- Short reach (9.5 mm) — must match engine spec exactly
- Solid terminal ensures secure connection in vibration-heavy environments
- Designed for engines using standard nickel plugs (not platinum/iridium)
- Typical service life: ~20k–30k miles / seasonal use depending on application
