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Thread: Yamaha ytm 175 or 200 cant remember high uncontrollable idle

  1. #1
    Join Date
    Jan 2017
    Location
    merrill wisconsin
    --
    17

    Yamaha ytm 175 or 200 cant remember high uncontrollable idle

    hey guys im back at it again

    got out to the shop today after a long winter to do yearly service on my wheeler
    oil changed spark carb cleaned the slide was stuck

    got it running again but the dang thing will not take on a low idle it idles steady like it would at about 1/4ish throttle
    for giggles i hopped on it popped it into first i ended up doing a cat walk and could not stop i hit the kill switch

    so my thought was to mess with the adjustments noting changed so i tried choking it with my hand actually raised the rpm

    cracking the throttle actually seems like it is working properly just at extreme rpms

    so guys what are your thoughts on this

    picture for you guys while i was camping
    Attached Thumbnails Attached Thumbnails 29026115_1603458013022782_2119056079806529536_o.jpg  

  2. #2
    Join Date
    Apr 2014
    Location
    Edmond, KS
    --
    2,537
    First off, I'm pretty sure that you have a 200. If it's a two stroke, then it's a 175. If it's a four stroke, it's a 200. Second, it sounds like you have the slide in backwards (I'm not the most up to date on Yamahas and I think you can do this like on a Honda). Try turning it around and see if that helps your idle.

  3. #3
    Join Date
    Jan 2017
    Location
    merrill wisconsin
    --
    17
    Quote Originally Posted by 350for350 View Post
    First off, I'm pretty sure that you have a 200. If it's a two stroke, then it's a 175. If it's a four stroke, it's a 200. Second, it sounds like you have the slide in backwards (I'm not the most up to date on Yamahas and I think you can do this like on a Honda). Try turning it around and see if that helps your idle.
    it is a four stroke and the ramp of the slide sits on the adjustment screw like it should for giggles i might try and flip it or spin it

  4. #4
    Join Date
    Nov 2015
    Location
    Davenport iowa
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    1,144
    Quote Originally Posted by cblaise View Post
    it is a four stroke and the ramp of the slide sits on the adjustment screw like it should for giggles i might try and flip it or spin it
    Don't turn it, it's in correctly, sounds like a plugged pilot jet to me..

  5. #5
    Join Date
    Jan 2017
    Location
    merrill wisconsin
    --
    17
    I pulled both jets the brass was clean I'm gonna try soaking the carb

  6. #6
    Join Date
    Jan 2017
    Location
    merrill wisconsin
    --
    17
    It does run with choke and without choke choke will give it more rpms about 500 more just guessing cos I do not have a tach still got to check for vacuum leaks

  7. #7
    Join Date
    Nov 2015
    Location
    Davenport iowa
    --
    1,144
    Quote Originally Posted by cblaise View Post
    I pulled both jets the brass was clean I'm gonna try soaking the carb
    Do you have a compressor? You need to blow air through all your passages and jets after soaking them.. can't remember what type of filter system those have but that would also be worth checking and cleaning..
    Do you have a manual? If not you need to get one.

  8. #8
    Join Date
    Jan 2017
    Location
    merrill wisconsin
    --
    17
    Quote Originally Posted by DAM shop View Post
    Do you have a compressor? You need to blow air through all your passages and jets after soaking them.. can't remember what type of filter system those have but that would also be worth checking and cleaning..
    Do you have a manual? If not you need to get one.
    no compressor i have a inline filter that is clear i do have to change that this year as this is the 2nd year that is has been on the trails since 2000ish i rescued it from a farmers field was running fine last fall i have not had time to mess with it yet ill update you guys when i get back out to it

  9. #9
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,012
    Check you manifold for cracks while your in there.
    It sucks to get old

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