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Gas in the Oil

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    Gas in the Oil

    my friend called today and he left his bike on prime and says there is gas on the floor of his garage. i'm going to take a look tomorrow afternoon, probably pull things apart

    can fuel get past the oil rings and fill the crankcase? i figure i'll need to drain the oil and change the filter after getting it all out of the cylinders, as it is certainly flooded

    anything else to look for?

    #2
    Petcock on Prime or leaking...constant fuel flow on float needles...needles start to leak (particularly if there is debris present)...float bowls overfill...gas spills over into throats of carbs and fills up crankcase. Some times the petcock leaks and sends fuel back down the vacuum line and into the engine.

    Check petcock for proper operation

    Check float needles for proper sealing

    Change oil and filter
    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 think it is the floats. the petcock is boinked, and send fuel when not under a vacuum. i ordered that kit. however, i don't think the float bowls should overfill the way they do if the floats are operating properly, correct?

      i'll see if i can find the floats specifications and bend them properly. my carb kit should be here today for this bike

      thanks

      Comment


        #4
        Most likely it is the needle and seat, which is what the tang on the float pushes against. When you open it up to check the float height, be sure and remove the needle and clean both the needle and the seat (the part that stayes in the carb).

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