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Thread: K75 Choke issue

  1. #1
    Dum vivimus vivamus ted's Avatar
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    Mar 2003
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    K75 Choke issue

    Ok, I know it is really an idle enrichment adjuster, but it is acting up nonetheless. The first notch does nothing, no change in idle speed, no affect on cold start. The second notch does work, and it hasn't been an issue until Saturday mornings 33-degree start, when I needed a little steady throttle to keep it going to warm up.

    I did look into the throttle bodies and as I move it to the first notch I can see a linkage move, and again to the second notch it opens further.

    Any ideas? Thanks folks!
    Ted
    "A good stick is a good reason"
    1994 K75RT
    Moto Pages

  2. #2
    Slipster Slipster's Avatar
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    It appears your idle pin is not set right

    When your bike is warm what rpm does it idle idle at? If it is high then you have an air leak (z hose)

    If that is the case you need to locate the leak ( z hose, throttle body caps etc,,) then adjust your airbox for correct fuel to air mix, then adjust the pin for correct idle position.

    With the pin set your choke / idle advance lever should do it's thing

    I am sure the real pros will chime in here to help you with solutions also
    Expect The Unexpected

  3. #3
    3 Red Bricks
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    Ted,

    No enrichment involved. It is simply a fast idle cam, that slightly holds the throttlebodies open.

    On a K75:
    Notch 1 is supposed to lift the throttle .059" at the idle screw.
    Notch 2 is supposed to lift the throttle .118" at the idle screw.

    Adjustment is at the cable on the right end of the throttlebodies.

    If those #s are correct, I would start by looking for a vacuum leak. Start with the crankcase vent hose and the vacuum caps at the throttle body base.


    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
    Mine, Hers, Spare

  4. #4
    Benchwrenching PGlaves's Avatar
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    I think Lee hit it on the head. The cable has probably stretched a little bit. I think readjusting the cable will solve the problem.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://www.bigbend.net/users/glaves

  5. #5
    Dum vivimus vivamus ted's Avatar
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    Thanks folks, I have recently replaced the vacuum buttons as well as the crank breather hose - I have not however measured the lift at the idle screw. Looks like slot #1 on the weekend chore list has just been filled .

    I did just find this as well:
    http://hrsbstaff.ednet.ns.ca/bvogel/...6%20(2227).pdf
    Ted
    "A good stick is a good reason"
    1994 K75RT
    Moto Pages

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