OT: sloppy weld leading to headset cup movement on kona unit- Mtbr.com
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  1. #1
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    OT: sloppy weld leading to headset cup movement on kona unit

    Sorry for the OT post but since this is where I usually hang out...

    I have a Kona Unit. At the downtube headset juncture, the weld is a but sloppy on the inside of the headtube. So basically there is a little bit of extra metal in there. It turns out that I have been having a hell of a time keeping my headset tight. And recently I have noticed movement of the bottom headset cup (CK) and a lot of creaking. If you apply the front brake, you can rock back on forth and see grease oozing around the bottom cup/headtube interface. And on the bottom headset cup itself there is a wear mark on the paint where that sloppy weld is. So I suspect what is going on is that bit of raised metal is causing the cup to deform slightly which leads to the movement.

    My LBS took a look at it and said there was not much you could do about it. I was thinking dremel but the LBS said that it was not a good idea. They said I could just live with it and it should be ok.

    Anyone have anything like this happen to them? Suggestions on solutions? TIA.

  2. #2
    nachos rule!
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    If I'm interpreting your description correctly, this sounds like a textbook case of "you need to get that head tube reamed & faced". If your LBS can't figure that out, you need a new LBS. Running it like that may have ovalized things a bit, so I'd use some Loctite 609 retaining compound when re-pressing the cups post machine work.
    plus a change, plus c'est la m'me chose - alphonse karr

  3. #3
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    Quote Originally Posted by supercorsa
    If I'm interpreting your description correctly, this sounds like a textbook case of "you need to get that head tube reamed & faced". If your LBS can't figure that out, you need a new LBS. Running it like that may have ovalized things a bit, so I'd use some Loctite 609 retaining compound when re-pressing the cups post machine work.
    I think you are. I didn't know there was a difference between reaming and facing. Looks like what I need is a good reaming. I know they faced it before installing the headset. Thanks.

    http://www.parktool.com/repair_help/...headface.shtml

  4. #4
    Rollin' a fatty Moderator
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    Why don't you PM Joe @ Kona to see what's his opinion. I ride a Unit and don't have that kind of problem, I can't afford a CK headset but my Cane Creek is working fine without any play or movement.

  5. #5
    theHeadlessThompsonGunner
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    Quote Originally Posted by supercorsa
    this sounds like a textbook case of "you need to get that head tube reamed & faced".
    Yup. Fire your LBS.
    "I've courted brain damage like some courtesan of darkness."


    -The Good Doctor

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