Product Details
Standard nickel-alloy spark plug from NGK — the same plug type the original manufacturer specifies for most factory-fit applications.
- Nickel-alloy center electrode with a copper core for stable heat range and reliable firing across the rev range.
- Trivalent-metal thread plating resists seizing and corrosion.
- Heat range and reach match the OEM plug — direct fitment, no jetting changes required.
- Gap is preset at the factory to NGK's reference; verify against the service manual before fitting.
- The economical baseline maintenance plug. Step up to Iridium IX or Laser Platinum if you want longer service intervals.
Spec: BR5ES
Fitment
- Honda NSR 50 AC08 1989–1995
Specifications
The NGK 5866 is a spark plug verified to fit 1 motorcycle including Honda NSR 50 AC08. It matches an OE oem spark plug BR5ES and spark plug gap 0.8 mm.
| Electrode Material | Nickel-alloy (copper core) |
|---|---|
| Thread Plating | Trivalent-metal |
| OEM Spark Plug | BR5ES |
| Spark Plug Gap | 0.8 mm |
Verified from Garamoto’s catalog & fitment data.