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Thread: 86' 350x smoking

  1. #1
    Join Date
    Nov 2023
    Location
    Memphis, TN
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    1

    86' 350x smoking

    I have a 1986 Honda 350x, that I could use some help with finding out why its smoking so bad. I am not really familiar with these machines, it was given to me from a friend that owned it and recently passed away. I have a short video to show you the smoking. Any help would be appreciated.
    https://vimeo.com/887768647?share=copy

  2. #2
    Join Date
    Jul 2005
    Location
    Manheim, PA
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    5,758
    Quote Originally Posted by Apeterson26 View Post
    I have a 1986 Honda 350x, that I could use some help with finding out why its smoking so bad. I am not really familiar with these machines, it was given to me from a friend that owned it and recently passed away. I have a short video to show you the smoking. Any help would be appreciated.
    https://vimeo.com/887768647?share=copy
    It's nearly 40 years old and needs a rebuild, while in there freshening up valve seats and seals and everything else wrong. Say good bottom end is tired by now too since no one has the nuts to split a case. $1500 rebuild. Do it yourself and enjoy another 40 years.

  3. #3
    Join Date
    May 2015
    Location
    San Diego, CA
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    1,746
    Quote Originally Posted by Apeterson26 View Post
    I have a 1986 Honda 350x, that I could use some help with finding out why its smoking so bad. I am not really familiar with these machines, it was given to me from a friend that owned it and recently passed away. I have a short video to show you the smoking. Any help would be appreciated.
    https://vimeo.com/887768647?share=copy
    That looks to me like something is burning near the rear master cylinder/brake line/exhaust/etc.

    I would first remove that exhaust wrap and get a good look in that area and see what's actually burning/smoking/melting.

    The motor sounds like it's running fine.... just look in that area and see what's happening.

    Good luck

  4. #4
    Join Date
    Jan 2018
    Location
    California
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    105
    Does it smoke out the end of the muffler if you blip the throttle or only on the side?

  5. #5
    Join Date
    Nov 2019
    Location
    Florida
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    1,044
    based solely on your video, it seems to be running ruff, I bet you have oil/unburned fuel in your exhaust and as the exhaust heats up its burning it off and causing smoke
    Option 2 is you are leaking something onto the exhaust, I have a plastic tank dripping fuel in that same spot and it smokes. the header wrap hold liquids and as they get hot they burn off, you need to fix this asap especially if its fuel.

    MrC.
    mrc_builds on YouTube Channel

    https://www.youtube.com/channel/UCmw...confirmation=1


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    84 200x "Van Halen"
    84 250r "lucky"
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    85 350x "The Money Pit"
    85 350x Code Red
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