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GS 400 carburetor compatibility

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    GS 400 carburetor compatibility

    Does anyone know what if any newer model's carbs are compatible with an my 77 GS400X?
    I'm looking at my carbs and my CV diaphragms are just about shot and need replacement. I know I need fuel shut off valves, should also replace the seals and o-rings.
    Instead of replacing all the parts with OEM NOS parts I was wondering if newer Carbs from A GS500e or GSF500 or other GS(X)400/450s would fit and work well on my GS400X. They would/could be at least 25 years newer, easier to find parts for and a rack in good shape off a running bike (GSF500) would only cost in the $200 neighborhood.
    Didn't know if anyone knew if this upgrade would be a possibility. One would imagine that newer Carbs would also mean better performance out of my 400.
    If it's not I plan on spending a pretty penny on restoring the stock carbs but I figured I would explore all options.
    Thanks!
    Last edited by Jedz123; 11-10-2011, 10:08 AM.

    #2
    Good question... I would imagine they should work if the size and spacing between the carbs is right...
    1982 GS450E - The Wee Beastie
    1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

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    450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

    Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

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      #3
      Yeah that's what I figured. I may need to do some investigating on the GS-twin forum.

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