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Spark plugs for dirt bikes

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  • Spark plugs for dirt bikes

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  • #2
    I thought this page from Frank Conleys handbook might be useful

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    • #3
      Interesting, thanks for sharing

      B9 EV is what I used to use on the 24MX4

      They're very cold, for use with 12:1 & up compression on MX4 is 11:1)

      Terry did have B9 EV a year ago

      Paul Andrews who I respoect said dont buy expensive spark plugs but do change them every event!

      NGK B8HVX is for racing (said Andy Z) who am I to dispute with him- short reach or B7HS for pottering around

      NGK said use BR9EIX uprated version 15

      approx cost of B9ES is 3.57 B9EG 5.95

      Cheers j

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