the right spark plugs

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  • sailfish
    Senior Member
    • Sep 2010
    • 175

    #1

    the right spark plugs

    in my 74 sporty i have #4 hd plugs in it it has 5,340 miles on it are they the plugs that came stock if not what plugs were stock? The bike sat in a barn since 1982 it looks to be stock
  • vph-d
    Senior Member
    • Jun 2005
    • 1074

    #2
    Your Sportster was delivered with number 4 plugs. They are the correct heat range for the bike.
    VPH-D

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    • sailfish
      Senior Member
      • Sep 2010
      • 175

      #3
      thanks for the help

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