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Thread: Drilling out JB Weld from exhaust bolt thread?

  1. #41
    Join Date
    Jun 2015
    Location
    Shelby, Ohio
    Posts
    462

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    You must have hit the bottom of the hole with the tap. I admire your persistence.
    These cases command thought and patience.
    The advice for a different head is good. You'll inevitably p**s off the machinist because he could have
    had a berry job at first but all of his options are gone now, except for EDM.
    You need to offset the price for another head with EDM now.
    Although a machinist with your persistence can probably do it.
    Alan


    Weaned on a '74 450 Honda
    Graduated to an '82 GS850GL
    Now riding an '83 GS1100GL
    Added an '82 GS1100GL

  2. #42
    Join Date
    Oct 2016
    Location
    Indiana
    Posts
    51

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    Taking this forum thread deeper than the one I tried to tap! Appreciate everyone's input. So I've made a strong super saturated solution of hot water and alum. I tried to epoxy a flex funnel around the hole. It's leaking. I'm going to let it rest and seal it up tomorrow morning then see what happens over the next 24 hours. In the meantime if anyone has a spare head for a 1980 gs850 let me know. If it's cheaper than taking it to a unexpecting machinist then that's the route I'll go! I'm grinning inside despite my furrowed brow because I know I'm being challenged and I'm going to finally get this right.
    Last edited by Kodak; Today at 08:13 PM.
    1980 GS850G

  3. #43
    Join Date
    May 2009
    Location
    Norman, Oklahoma
    Posts
    22,603

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    By the time you take it to a machine shop...pay them..and the down time involved youll be ahead of the game to just get another head and swap it in. Just my 2 cents worth anyway.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C(X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

  4. #44
    Join Date
    Oct 2016
    Location
    Indiana
    Posts
    51

    Default

    Hey I'll take your two cents! I really want to minimize the down time involved in getting this going. What's a fair price for a head?
    1980 GS850G

  5. #45
    Join Date
    May 2009
    Location
    Norman, Oklahoma
    Posts
    22,603

    Default

    Few of them on Ebay now. I would make a parts wanted section add first. The forum guys will not try and sell you a head with an issue..broke off studs, scarred cam journals etc etc.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C(X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

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