Drove With Gas in Oil
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Thread: Drove With Gas in Oil

  1. #1
    Member thats_incentive's Avatar
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    Thumbs up Drove With Gas in Oil

    That's right. Took her out for a spin yesterday, 2-3 miles all under 25mph. By the end she was riding rough, like hard vibrations. Furthermore as I was nearing home, I began experiencing hanging revs where I would let off throttle and the revs would slowly fall after a moment of staying.

    Checked my oil which smelled faintly of gasoline. Damn.

    Obv protocol will be to properly flush the crankcase cold kicking with bike off, drain, and put new oil, but I'm fearful I have caused serious damage after some reading. Something about bearing surfaces.

    Still haven't adjusted cam/valve/timing so this could be why it was hanging and riding rough but it wasn't doing that before.

    What do you think? Any insight would be much appreciated while I'm further reading up on this topic in the meantime.

  2. #2
    Supporting Member jd50i's Avatar
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    Sounds like carb problems such as improper float adjustment to let fuel leak into crankcase, air leak around the carbs causing the hung revs.
    I suggest a full carb cleaning, inspection and proper adjustment along with posting the year, make and model of your bike along with any changes from factory like pods, aftermarket exhaust etc.

    Forums are like computers, the better info you put in, the better results you get out.
    ancientdad and Rob Axel like this.
    Jim

    1973 CB 450 K6 PAMCO
    1975 CB 500T PAMCO
    1985 CB650SC Nighthawk
    1985 VF 1100S Sabre
    2012 Buddy 125 (wifes)

  3. #3
    Member thats_incentive's Avatar
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    Well yeah I had a bad float with a pinhole that I tacked shut with solder after draining. I agree carb overhaul is necessary, and in the cards.

    Alright. All stock CB350 K3, 1971 although that information can be found with a quick glance at my introduction.

    I'll flush the oil and see if gas is still getting in there.

    Interesting analogy. Likewise, you need a good software to read the information you plug in.

    The nature of this post isn't troubleshooting. I asked if damage likely occurred based on the information I did plug in to the forum computer machine.

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  5. #4
    Senior Member ancientdad's Avatar
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    It's just a pet peeve of mine, but... don't you ride a bike, and drive a car?
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    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  6. #5
    Member thats_incentive's Avatar
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    You don't do anything if there's gas in the crankcase.

  7. #6
    Supporting Member jd50i's Avatar
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    Adding a bike to your signature would eliminate others from having to research your information to help you.
    Without any obvious symptoms, the only way to see if any damage occurred would be to open it up. We have no way of knowing what concentration of fuel was in the oil, if the oil was thin enough then as you have read there could be damage.
    For me, fix the carbs, change the oil, clean the filter, watch for the engine making metal at oil changes and ride it.

    You do turn the petcock off when parked correct?
    Jim

    1973 CB 450 K6 PAMCO
    1975 CB 500T PAMCO
    1985 CB650SC Nighthawk
    1985 VF 1100S Sabre
    2012 Buddy 125 (wifes)

  8. #7
    Member thats_incentive's Avatar
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    Done.

    Ok, thanks for the help.
    Last edited by thats_incentive; 05-09-2019 at 01:12 PM.
    1971 CB350k3

  9. #8
    Senior Member ancientdad's Avatar
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    Since it's a 350 and not the SOHC 400 series with plain bearings, you're probably okay... the most likely quick wear area on the 350 would be the cam bearing caps and rockers with thinned oil... so, ride on
    jd50i likes this.
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  10. #9
    Member thats_incentive's Avatar
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    Ok thank you for the help ancient dad that is the solid info I was hoping to hear although I'll still proceed with caution.

    And yes I do apologize,that was just my "cager" history haunting me.
    Last edited by thats_incentive; 05-09-2019 at 01:59 PM.
    1971 CB350k3

  11. #10
    Senior Member ancientdad's Avatar
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    Quote Originally Posted by thats_incentive View Post
    And yes I do apologize,that was just my "cager" history haunting me.
    no need to apologize - if all of us corrected every single misspell or improper terminology use by any of us here, we'd never get anything else done as we all do it from time to time... but riding - that's the motivating force behind what makes us different than drivers!
    oupa likes this.
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

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