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Thread: Low jet emulsifying tube

  1. #21
    OCR
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    ^^^^^^^^^^^^^^^^^^^^^^
    Add your location to your profile.
    Someone may be close enough to help.
    If you need a carb body, I have a pair.
    PM me for info.
    nolimitz likes this.
    Past Master, Dryden Lodge #472
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    '79CX500C

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    we are all given sh*t in life, but some of us learn to turn it into fertilizer and grow from it, and some us try to fling it on others like monkeys.

  2. #22
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    Quote Originally Posted by earlmina View Post
    Worst possible thing happened.
    The 4-40 tap, not the easy out,
    The 4-0 tap was a thread-cutting tap for 4mm threads ?
    The bore in the jet has 2.0mm.

    Before using the 4mm tap did You make a bore with 3.2mm ?

    The reason for 3.2mm bore is:
    Generally and normally when a thread has to be cut the bore must be:
    Thread size mulitplicated with 0.8.
    Examplef or a M6mm thread ---> 6mm x 0,8 ===> 4.8mm drill
    In Your case: M4mm x 0.8 ===> 3.2mm.
    My rule is:
    When I have to cut a thread I do this:
    Turn the tap three-quarters forward. Then one quarter backwards, ...again three-quarters forward, .... one quarter backwards.
    After four or five turns I unscrew the tap, Clean it and blow with air pressure into the bore to blow out the shavings. (safety goggles !!! )
    Then again I continue the cutting.

    To cut brass is dangerous

  3. #23
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    I wish I was more technical then I would probably be aware of those steps. It is what it is now...

    But That info is highly useful to another user on here who is writing an article on my blunders to help others avoid the situation

    Just trying to look on the bright side and keep the motivation
    purplecx500 likes this.
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  5. #24
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    Thank You Larry for that picture

    Name:  Carbcut.jpg
Views: 49
Size:  151.0 KB
    @earlmina: It's never to late to learn new things
    _______

    As a last idea (or brain fart) to help:
    You see that picture there is a channel/hole from the jet leading to the cover of the ACV (AirCutValve).
    The diameter is 2.0mm and straight.
    If You can get a single copper wire/cable.
    You can insert it from the (ACV-) bore leading to the jet.
    With a little heat near to the jet and a very little hammering on the copper wire, ......maybe You're lucky to press out the jet. ---> If it's not screwd/has not a thread)

    "Normally" this part of the carb is for the bin, so more damage doesn't matter.

  6. #25
    Senior Member chilimac's Avatar
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    earlmina,
    For what it's worth, I just found a pair of those #45 pilot jets in my spares bin. If you don't want to spend a lot of time searching for new ones, you can have them for the cost of shipping from Virginia to Canada, assuming you're able to get the old ones out of your carb bodies. They're in good shape, all holes free and clean. Or if you can get your remaining undamaged one out, then you'd only need one more. I'll keep an eye on this thread to see how you make out.
    CXPHREAK and purplecx500 like this.
    1979 CX500 Custom, "Malaria", pronounced "mala-REE-ah"

    Prior bikes I wish I still owned:
    1965 Ducati 250 Monza
    1973 Kawasaki H1E 500cc triple
    1968 Honda CL450K1 scrambler
    1984 Kawasaki KZ700A
    For something completely different, look me up on YouTube under "muttbert"
    Full-service misanthrope and curmudgeon
    One of the great unanswered questions: Why is "bra" singular and "panties" plural?

  7. #26
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    so last night I tried to drill out the jet

    I was going pretty hard at it, resulting in the drill bit snapping.

    somewhere along the lines I think I damaged the carb body

    here are what both of my carbs look like

    Name:  1.jpg
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Size:  661.3 KBName:  2.jpg
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Size:  493.3 KB

    the one with the pink marking shows my failed attempt to drill it out, also resulting in what looks like a chip in the upper end of the opening

    guellli - thanks for your suggestion, I don't think I can get it out from the bottom because I wasn't able to drill out the threaded portion. i'm gonna have to get that out first

    chilimac - thanks for your feedback. what are your thoughts on the damage to the body of the carb? should I just find a new carb body or new carb set
    Last edited by earlmina; 04-18-2017 at 09:25 AM.
    79 CX500

  8. #27
    Senior Member chilimac's Avatar
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    Looks to me as though you might still be able to use that carb body if you can get the pilot jet out without damaging the metal it sits in, and as long as there's still enough left above it to plug in the rubber stopper securely. That's a left-hand carb, and I have a very clean left carb body but it's the kind with an accelerator pump, and as far as I know the two types are not compatible. Perhaps some of the experts can comment on that. (I also have a matching right-hand carb body so in theory it would be possible to assemble a matched carb set, but I think that would be more trouble than finding a complete working set if you're unable to successfully repair what you've got there.) Murray and Larry are the experts on Keihin carbs, and I think both of them have working sets available. Other forum members have offered up good sets from time to time, especially if they've just installed Murray's Mikunis.

    That's kind of a long-winded answer, sorry.
    1979 CX500 Custom, "Malaria", pronounced "mala-REE-ah"

    Prior bikes I wish I still owned:
    1965 Ducati 250 Monza
    1973 Kawasaki H1E 500cc triple
    1968 Honda CL450K1 scrambler
    1984 Kawasaki KZ700A
    For something completely different, look me up on YouTube under "muttbert"
    Full-service misanthrope and curmudgeon
    One of the great unanswered questions: Why is "bra" singular and "panties" plural?

  9. #28
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    im almost certain mine has the accelerator pump too.

    This is the accelerator pump?
    Name:  IMG_0095.PNG
Views: 43
Size:  1.31 MB

    when i dismantled the carb, i wrote down every single part i took off (based on larrys guide)
    Last edited by earlmina; 04-18-2017 at 11:15 AM.
    79 CX500

  10. #29
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    I checked my photos. Both sides of my carb have that accelerator pump.. if i am correct...

    Name:  IMG_0075.JPG
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    Attached Images Attached Images  
    Last edited by earlmina; 04-18-2017 at 11:46 AM.
    79 CX500

  11. #30
    Senior Member chilimac's Avatar
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    Those are the air cut valves. All of the Keihin carbs have them. The accelerator pump was on the left-hand carb only on just one year's bikes, if I remember right.
    1979 CX500 Custom, "Malaria", pronounced "mala-REE-ah"

    Prior bikes I wish I still owned:
    1965 Ducati 250 Monza
    1973 Kawasaki H1E 500cc triple
    1968 Honda CL450K1 scrambler
    1984 Kawasaki KZ700A
    For something completely different, look me up on YouTube under "muttbert"
    Full-service misanthrope and curmudgeon
    One of the great unanswered questions: Why is "bra" singular and "panties" plural?

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