NSS250 Reflex Spark Plugs

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Stock

  • NGK DPR7EA-9
  • Denso X22EPR-U9

Extended High Speed Riding

  • NGK DPR8EA-9
  • Denso X24EPR-U9

My Choice

Since about 10 miles of my 27 mile commute is WOT at 75mph, I'm going to try running the colder plug option.