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  1. U

    homemade COP?

    If it runs right, you did it right. "If it ain't broken, don't fix it" For future reference, AFAIK, if you look into the connector on the COP, the left terminal is the ground (negative) polarity, for both the input and output coils.
  2. U

    homemade COP?

    Hi, Bill, As far as I can find out, if you're using the GSXR coil stick (or similar), the coil stick definitely does have polarity at the connector, and how it's wired does make a difference. If you go to the Denso web site and find their "Direct Ignition Coil" catalog , you'll read that the...
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