Carb leak at mixture screw
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  1. #1
    Junior Member sjctool's Avatar
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    Apr 2013
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    Hi I'm new to this forum, and this is my first post. I have a 1989 TW200 which just hit 3000 miles. I have owned it since 2200 miles and it runs fine, however there is a small leak at mixture screw (plug lost or removed by previous owner). Leaks just enough to be annoying and create a bit of varnish on outside of carb. I would like to know possible causes before I get into removing the carb and taking it apart.



    I find it crazy that the year of bike is same as my HS graduation year, so in 2O+ years I've managed to go to college, get married, build 2 houses and have three kids. And someone else managed to just put 2200 on this bike!

  2. #2
    Senior Member RisingSun's Avatar
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    Jun 2011
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    Mixture screw? I am pretty sure its just a o ring. They get old or pinched. Easy fix.

  3. #3
    Senior Member elime's Avatar
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    Quote Originally Posted by CharlestonTDub View Post
    ........someone else managed to just put 2200 on this bike!


    A common story.
    Long live the internal combustion engine!

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  5. #4
    Senior Member r80rt's Avatar
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    Sep 2011
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    Welcome to the forum, yep it's most likely the O ring.

    I've put 3100 miles on mine since October.
    Only a fool would attempt it, and God help me, I am that fool!

  6. #5
    Junior Member sjctool's Avatar
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    Apr 2013
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    Thanks for the welcome and the tips. It is good for me to be confronted with something simple. I'm hoping this motor is easier to work on (and more reliable) than my 88 OMC outboard!

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