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Thread: Carb cleaning

  1. #1
    Join Date
    Jul 2006
    Location
    creswell,just south of sheffield
    Posts
    394

    Carb cleaning

    ive got a set of mikuni tmr carbs fitted and its not running right on 1 cylinder.done all usual checks a narrowed it down to 1 of the carbs.cleaned them and still the same so think its somewhere i cant get at so just asking do you think if i had them ultrasonically cleaned that would help and if so any recomendations.many thanks.

  2. #2
    Join Date
    Nov 2016
    Posts
    237

    Re: Carb cleaning

    If u have them stripped ready for cleaning try spraying/ squirting some carb cleaner or cellulose thinners into the little jet/ vent holes and see where and how fast it exits (do it over a bowl).

    If your internal blockage theory is right one of them should behave differently and you will have a start point to investigate.

    If you get the jets out I have used a thinnest E electric guitar string (single wire strand) to pass gently through to ensure no obstruction. Don't use a wire brush bristle as they are too fat and prone to snapping off.

    Good Luck

  3. #3
    Join Date
    Jul 2006
    Location
    creswell,just south of sheffield
    Posts
    394

    Re: Carb cleaning

    ill give that a try before i send them.

  4. #4
    Join Date
    Jun 2014
    Location
    Norf East
    Posts
    8,062

    Re: Carb cleaning

    Ultrasonic is the best way (then followed by carb cleaner / compressed air)

    Your inbox is full so clear some shit out as i am trying to send you a pm good sir

  5. #5
    Join Date
    May 2011
    Location
    NORTHUMBERLAND UK
    Posts
    1,252

    Re: Carb cleaning

    Strip down to the carb bodies and leave them in a bath of diesel for a few days, moving them around now and then so diesel gets in every hole/channel.
    Diesel has cleaning agents and detergents which clean and wash alloy very effectively.
    Then poke every hole to get rid of any stubborn blockages the diesel will have softened.
    Next wash in petrol to remove the diesel then use a 100psi line through every hole/channel to blow any loose crap out and check its clear with WD40 and a tube.
    I have used this method for the past 30 years (shown to me by my foreman mechanic) and it works a treat, never fails.
    Have tried sonic cleaning but never had 100% results from it always removing the crap in the very small idle/primary holes/channels from it, unlike this method.
    THE OLDER I GET THE BETTER I WAS...................

  6. #6
    Join Date
    Jun 2014
    Location
    Norf East
    Posts
    8,062

    Re: Carb cleaning

    Quote Originally Posted by RETROBOY View Post
    I have used this method for the past 30 years
    You challenging Pal's brake bleeding record then

  7. #7
    Join Date
    Feb 2007
    Location
    Colchester Essex
    Posts
    3,357

    Re: Carb cleaning

    Quote Originally Posted by RETROBOY View Post
    Then poke every hole to get rid of any stubborn blockages.
    I'll have a go, but I'm not convinced she will let me !
    Last of the " Essex Geezers "

  8. #8
    Join Date
    Jul 2017
    Location
    South from the Deep South
    Posts
    1,224

    Re: Carb cleaning

    Describe running problem with the bike in details... that way problem can be narrowed to particular carb circuit or system...
    Bloody Foreigner


    Stump the Chump players apply here...

  9. #9
    Join Date
    May 2011
    Location
    NORTHUMBERLAND UK
    Posts
    1,252

    Re: Carb cleaning

    Quote Originally Posted by ZRXNige View Post
    You challenging Pal's brake bleeding record then
    Haha,

    Served my time from 1977 to 1981, so more years ago than I care to remember unfortunately !!!
    THE OLDER I GET THE BETTER I WAS...................

  10. #10
    Join Date
    Jul 2017
    Location
    South from the Deep South
    Posts
    1,224

    Re: Carb cleaning

    Quote Originally Posted by RETROBOY View Post
    Haha,

    Served my time from 1977 to 1981, so more years ago than I care to remember unfortunately !!!
    Diesel works in a pinch. Don't you have dedicated stuff available for carb dunking?







    This one above is a tourist grade, shops can even get really nasty stuff.



    Lastly, jets are cheap. If in doubt drop new ones...
    Last edited by WJ-Polish Guy; 2nd May 2018 at 04:52 PM.
    Bloody Foreigner


    Stump the Chump players apply here...

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