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NGK Standard Spark Plug — BPR4ES

Part # 6578
Item #BPR4ES
Fits 5 motorcycles
  • Boss
    • HOSS
  • Yamaha
    • YXP Pro Hauler 700 2WD YXP700AS · 2004–2007
    • YXP Pro Hauler 1000 YXP1000AS · 2004–2006
  • Arctic Cat
    • AC 120 SnoPro AC · 2010–2013
    • ZR 120 ZR · 2014–2015
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NGK Standard Spark Plug — BPR4ES
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: BPR4ES

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