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a little advice on the heads

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    a little advice on the heads

    Ok, so I introduced myself in the owners thread, 82 GS750E. I have begun the tear down for cleaning purposes, the bike does not run currently. I will be ordering the o-rings as soon as my $$ transfer gets to paypal, and I am picking up some carb dip and spray today for carbs. I have the service manual downloaded and DIY manual ordered, new gel battery ordered, Rotella T and new filter in hand, and 4 new plugs.
    When I pulled the carbs off (82 750E has boots, so no o-rings) there was a tannish-cream colored powder that came out of the intake ports and the boots. After doing some research on here, I am guessing some previous owner used some kind of sealant to stop air leaks instead of replacing the boots, and this has dried... the picture below shows the intake with most of powder removed from inside the port with my fingers, but you can see it surrounding the outside of the ports where the boots fit.
    So my question is this... I have purchased the above parts and materials in preparation to clean and try to start the motor before I purchase anything else. Does anyone see any major reason to pull the head since this is on the intake side? I could pull the exhaust and blow compressed air through combustion chamber to clear it out... I don't mind doing a thorough job on the bike, but would like to know what else I am looking to have to replace before I decide how much money I am willing to spend to get the bike going.
    Thanks in advance and sorry for such a long post... fyi, I have never torn down a motorcycle motor to test for such things as cyclinder wear, etc.. So that would be either all new ground for me or a trip to a machine shop $$.

    Brad

    #2
    A rag with some brake cleaner or carb cleaner should get the majority of that off.
    Otherwise, you could pull the camshaft (thus closing the valves) spray/scrub the ports down and blow out with compressed air. Rinse and repeat.

    Daniel

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      #3
      I'd plug the ports with rags and then scrub the spigots with a stainless steel wire brush. The engine is most likely fine. I wouldn't worry too much at this point. I'd squirt some Marvel Mystery Oil in the cylinders and let them soak while you do the carbs.
      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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        #4
        so far I am liking the advice... rags have been in the ports since I removed the carbs and snapped the pics. I will get the oil, have the brushes and cleaner and do just that, thx Ed and Daniel.

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