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Help: cleaning fuel out of case

Discussion in 'XJ Technical Chat' started by nickbrit16, Jun 15, 2015.

  1. nickbrit16

    nickbrit16 Member

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    So as some of you may know already from my previous posts, I bought a bike that has a crank case full of oil/fuel. While I'm getting ready for the carbs to be worked on, I need some advice on how to clean the oil/fuel mixture out. Obviously a basic oil/filter change but where do I go from there?

    Thanks in advance!
     
    nickbrit16, Jun 15, 2015
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  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    thats about it then a oil change sooner. or again after running for a while.
    I think some models also have a hard to reach drain near the transmission part of the engine depends on the bike what do you have
     
    XJ550H, Jun 15, 2015
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  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Just drain it, replace the filter and then do another oil change in 100 miles. There is some oil in the middle gear area that won't drain the first time, but not enough to fuss over. The residual gas will evaporate quickly. The oil/gas mix that you drain out can be diluted with more gas and used in your lawnmower, or used as-is to start a nice warm bonfire.
     
    k-moe, Jun 15, 2015
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  4. nickbrit16

    nickbrit16 Member

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    Ok, I though I read on another thread about doing the oil change, then running seafoam through it, then another oil change...
     
    nickbrit16, Jun 16, 2015
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  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You may have, but that is silly since sea foam is mainly Naptha, which is another solvent. The gas already thinned the oil, and likely freed up any sludge in the process. What you're trying to do now is get that solvent out and get enough oil in there to prevent bearing damage.
     
    k-moe, Jun 16, 2015
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  6. nickbrit16

    nickbrit16 Member

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    Ok, so I did the oil/filter change today. The oil was pretty thick and dirty (sludgy). After the oil change I fired her up and let it idle (open choke since it won't run without choke on) for about a minute to get the new oil flowing. Then I shut her down. Does that sound appropriate?
     
    nickbrit16, Jun 16, 2015
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  7. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    I would go ahead and ride with the new oil. The important thing is that you get the carbs off and cleaned, along with replacing parts as needed and rebuilding the petcock so there won't ever be any gas in the crankcase again. If you leave everything else as-is you will be repeating the process very shortly (as soon as the next day).
     
    k-moe, Jun 16, 2015
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  8. nickbrit16

    nickbrit16 Member

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    I don't think it's rideable with the choke on is it?
     
    nickbrit16, Jun 16, 2015
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  9. wrenchmonkey

    wrenchmonkey Member

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    It may not be optimal, but you can ride around with the choke on. On motorcycles the choke is not really a choke like in a car. It's a fuel enrichment circuit. There are no plates that will restrict the air flow.
     
    wrenchmonkey, Jun 16, 2015
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  10. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The choke should only be used while the engine is warming up. If it needs choke to stay running beyond that you are just masking a problem. CLEAN THE CARBS and DON"T RIDE THE BIKE ANY MORE UNTIL YOU DO. :)

    In the Church of Clean

    Also check valve clearances and all of the other VERY IMPORTANT maintainance items listed in The Information Overload Hour. Anything less and you will be chasing your tail for years, instead of riding, confident in the reliability of your machine.
     
    k-moe, Jun 16, 2015
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