Can you use a Resistor spark plug?

Discussion in 'Motorized Bicycle General Discussion' started by RLorange, Jun 24, 2008.

  1. RLorange

    RLorange New Member

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    Hey guys!

    Just wondering if anybody knows about 'Resistor' type spark plugs.
    I have an NGK BR7HS which I assume is the same as a B7HS but with a resistor. It seems to work fine but I really don't want to damage my CDI if that is at all possible
     
  2. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    It shouldn't hurt anything.....I do wish I knew the KV output of the CDI though.
     
  3. RLorange

    RLorange New Member

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    Well my high tension spark lead has 20kV written on it if that helps...

    I guess it must be under that?
     
  4. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Yeah it's not really strong....guessing in the under 10KV range but I could be full of stuff....it works better with a small gap.
     
  5. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    It won't hurt the CDI, it will reduce noise and spark output.
     

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