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82 GS450T won't hold an even rev

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    82 GS450T won't hold an even rev

    Hi,

    1982 GS450T:

    When I hold the throttle to rev at about 5k rpm, the engine revs up and down between about 4k and 5k.

    Full story: Engine was running ok, but had the tradition high idle when hot. I just got the bike and wanted to look through the carbs (BS34 CV) and verify the float levels. W/O the gasket these measured 25mm, so I adjusted them t0 22 mm per the specs. This caused excessive up/down rev'g and limited it to about 4k rpm. So, I returned them to 25mm assumiing that was the proper fit for this bike. Now it does it less, but still as described.

    Ideas anyone?

    #2
    Air leak

    Please check the Newbie Mistakes thread linked in my signature.

    Your bike needs maintenance.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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      #3
      Originally posted by Nessism View Post
      Air leak

      Please check the Newbie Mistakes thread linked in my signature.

      Your bike needs maintenance.
      Just back from a camping trip with the family and "needed" a good laugh.

      Thanks for setting me up, ED ! !

      Comment


        #4
        Welcome! And +1 to the maintenance comments above...

        Pay a visit to the GS Owners forum and go through the sticky for new members, you won't regret it.

        Also, if the manual is a Clymer, it's setting for the floats is incorrect and it's actually 26.6mm from memory +/- 1mm.
        1982 GS450E - The Wee Beastie
        1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

        sigpic

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

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

        Comment


          #5
          +1 on the float bowels.. I just set these on mine and 22 is wrong.. I set mine to 26.5 and all is well with the world. Also the high rev was the intake boot orings on my bike..

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