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1978 gs400 carb adjustment

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    1978 gs400 carb adjustment

    Can anyone help me with adjusting my carbs I just took them apart to clean them and all the bike does now is back fire and start fires in air box the only adjustments that the owners manual give is turning the plastic knob for idel control I know the carbs need to be sycronized but I just want to make adujstments to get the bike running to do this.
    any help would be greatly appreciated.
    Thanks Chaffee

    #2
    Did you put the airbox back on?
    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
      I only pulled the filter out. this is the second time I took the carbs out the first time the longest I could get the bike to run was about 30 sec. and it had no power. apon examaning it again I had one float backwards. I can tell I got the missing power but it will not run at all just back fires

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        #4
        Greetings and Salutations!!

        Hi Mr. jchaffee5,

        I'm glad you joined us. Used the VM carb cleaning guide to make sure your carbs are really clean. These bikes really need a properly sealed airbox with an air filter installed. Otherwise you really mess up the fuel/air mixture. There's more info in the links below. Let me say "Hi"...

        Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", the Carb Rebuild Series, and the Stator Papers. Now let me roll out the welcome mat for you...

        Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

        Thanks for joining us. Keep us informed.

        Thank you for your indulgence,

        BassCliff

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