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Thread: 85 350x gas and oil problem

  1. #1
    Join Date
    Mar 2008
    Location
    Canby Oregon usa
    --
    68

    85 350x gas and oil problem

    what would cause gas in the oil.
    i openend up my oil cap today and gas and oil (mainly gas) came out of it and i am stumped on what is the problem the only thing i can think of is the case is crackred somewhere and it runs fine and dosent smoke at all
    85' KLT 110
    ATC 86' 200x

  2. #2
    Join Date
    Oct 2007
    Location
    Minneapolis mn
    --
    4,067
    needle and seat are sticking in the carb....
    No trikes. Too old, too crippled. Unless I find one I can't live without!
    "You cant fix stupid" ~ Ron White
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  3. #3
    Join Date
    Apr 2006
    Location
    Crestview, Florida
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    2,429
    Worn carb needle, carb float, or a clogged fuel tank cap vent
    The person who says it cannot be done should not interrupt the person who is doing it.


    Rides
    85 ATC350X
    85 ATC200X


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  4. #4
    Join Date
    Mar 2008
    Location
    Canby Oregon usa
    --
    68
    Okay. Could that ruin an parts inside the case potentialy. It has been sitting with the gas on now for a Week or so and if the best bet would to drain all the oil out and put fresh in it and then do it all againuntill there I'd no more left or Very little
    85' KLT 110
    ATC 86' 200x

  5. #5
    Join Date
    Jan 2003
    Location
    Southern MN
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    1,875
    Yes, I would change it right away if there was gas in the oil. It shouldnt have hurt anything by just sitting there for that short of time. The problem would be running it like that. The gas would break down the oil in the crankcases and become so thin that it could cause failure to bearrings and such. Make sure you always turn your petcock to the "off" position when you are done riding, that will allow minimal if any gas to get into the bottom end. Probly test the carb needle and seat with vacuum pressure (mighty vac) to see if the needle/seat have a good seal, or visually inspect the needle for wear at the tip if you know how to. Goog luck, and hope this helps.
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    84 Honda ATC 250R
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  6. #6
    Join Date
    May 2009
    Location
    Brampton, ontario
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    686
    it wont damage anything besides seals, and that would take along time. as long as its sitting, if you run it like that it will cause harder wear on the entire engine. but most common problem with this is the float sticking. your carb slowly floods out. if you have air box on it. its going to flood through there and into your case vent. it was one problem i had when i brought the yammy home. i pulled a newb move and fired it up before changing common things like dif fluid, oil, plug. coolant where applicable. it had tons of gas in the case with the oil from a float being installed upside down by the PO, i wondered why it overheated. then i smartened up and changed the oil, plug and dif fluid.
    Looking for some smaller style tires like the r's have, just 2 back tires. pm please.

  7. #7
    Join Date
    Mar 2008
    Location
    Canby Oregon usa
    --
    68
    Alright thank you huys so much you saved me from tearing my whole motor apartto see if there was a cràck in that cylinder or piston
    85' KLT 110
    ATC 86' 200x

  8. #8
    Russell 350X's Avatar
    Russell 350X is offline Testicles between my toes at the devils backbone Teaching quads a lesson
    Join Date
    Mar 2003
    Location
    Steamburg/Randolph NY
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    3,092
    Rebuild the carb, last time I did mine it was 20$...change your oil and filter ASAP also....make sure you put the filter in the right way.
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