Dark at High RPM

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  • Erkenstiz
    • Mar 2026

    #1

    Dark at High RPM

    I recently finished rewiring my '79 GS1000L and everything seems to work fine, until I get the engine above about 6,000 RPM at which point the gauge cluster and headlight all go dark. I was wondering if anyone had an idea of where I should start to look to fix the issue? The bike has a new stator, LED tail light, Dyna ignition and coils, and SH775 R/R.
  • posplayr
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    • Dec 2007
    • 23673
    • Tucson Az

    #2
    Use a voltmeter to see if the battery voltage is dropping below 12.8V. If not you probably have a loose connection.

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    • Redman
      Forum LongTimer
      Past Site Supporter
      Super Site Supporter
      • Mar 2004
      • 13764
      • Michigan, west Michigan

      #3
      "Dark" as in completely out?.... or just dim like the charging isnt working ?
      Bikes
      Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​

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