spark plugs

Discussion in 'Touring Models' started by tdj45, Mar 30, 2010.

  1. Hoople

    Hoople Account Removed

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    I would have thought that also but just to check I tried to look up if a NGK was available for Harley. I can't believe it. Not a single plug available for anything after 2005. Maybe has something to do with ion detection.
    Something about them is special(?)
     
  2. Bud White

    Bud White Well-Known Member Retired Moderators

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    im pretty sure you can get a ngk for 2005 and later i was looking b4 .. and the twin cam spark plug # is the same from 2k to 08 at least .. .. i do see what your saying that there site doesnt list anything .
     
  3. Jack Klarich

    Jack Klarich Guest

    Harley plugs and Champion plugs are close but not exact. The electrodes are slightly different as well as the insulators and ofcourse the H D script, but they are indeed made by Champion, Jack
     
  4. Hoople

    Hoople Account Removed

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    Just for the fun of it I checked the resistance of a new Harley Plug (6R12 #32362-04).
    It measures 33K. I have Never seen a resistor plug with that much resistance built into it. That's insane. 10K I can understand, but 33K. It must have something to do with the Delphi Ion Sensor current detection circuits.
    I guess NGK wanted to stay away from that.
     
  5. Xrider

    Xrider Member

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    99-2010 Harley Twin Cam NGK Iridium IX Spark Plug DCPR7EIX
    (#99-09twincam)



    Spark Plugs
     
  6. nvsteve

    nvsteve Member

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  7. Hoople

    Hoople Account Removed

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    Thanks!
     
  8. Thorns

    Thorns Active Member

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    I use Champion RA8HC the cheapest I can find. I change them every 5K...never a problem.

    Thorns
     
  9. hoggy25

    hoggy25 Active Member

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    I used to index plugs on my Shovel and EVO. With the cams I had in those engines I thought they needed it. But I don't think it really was worth the time and effort I put into it. Don't do it any more though. Still have plenty of indexing washers. lol. Only worth it in a true racing engine.
     
  10. davidlee

    davidlee New Member

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    I understand this is true. I was just reading about plugs and from what I read basically the only difference is how long they last. This is copper vs platinum vs iridium. I do have a '91 flhtcu and I do believe it got better mileage when I put the "split tail" plugs in. Not sure what the official name is but it supposed to make a bigger spark. It's been several, 15 years?, since I changed over to those.