Manual Petcock swap for a GS850L

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  • noahjar
    Forum Newbie
    • Aug 2025
    • 7
    • Des Moines, Iowa

    #1

    Manual Petcock swap for a GS850L

    I was doing some digging and I found that the 79 750L has the same part number for the tank as the 80 850L. So I was curios if I could just get a petcock off a 79 and just put it on my 80 so I don't have to deal with the vacuum operated petcock?

    Thanks for the Help!
  • dgates1
    Forum Mentor
    Super Site Supporter
    • Jun 2024
    • 344
    • Arlington, TX

    #2
    I don't think it will fit due to the CV carbs that are on the 80 model. That petcock hangs down too much.
    - David
    80 GS850GL, 82 GS1100G
    Arlington, TX
    https://visitedstatesmap.com/image/ARMNMTNDSDTXsm.jpg

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    • lizzywhite45
      Forum Apprentice
      • Jul 2023
      • 48
      • Washington, DC

      #3
      Yeah, the tanks match, but the petcock from the '79 might hang too low for the CV carbs on the '80 850L. Could end up messing with the fuel line routing. You can make it work with some tweaking, but it's not a direct swap. Might be easier to go manual with an inline shutoff if you're just trying to ditch the vacuum setup.

      Comment

      • jprice90
        Forum Newbie
        • Sep 2025
        • 12
        • Southern NJ

        #4
        these petcocks are fine, get an oem one and rebuild the old original one. skip the replacements and just try to find an oem on ebay

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