Broke off a sprocket bolt, looking for some advice (KLR650)

Discussion in 'The Garage' started by Kino, Feb 10, 2021.

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  1. Kino

    Kino Adventurer

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    Broke off a bolt on my rear sprocket while tightening. How would you fix this ?

    first pic is the back and other pics are front.

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    #1
  2. trials935

    trials935 Been here awhile

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    Little bit of heat from a propane torch and a pair of vice grips, should come right out.
    #2
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  3. H96669

    H96669 A proud pragmatist.

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    Stud not bolt.Heat it and use the ViseGrips on what's left of the stud.

    Heat as in over 350/400F in case of Loctite?

    But 7 left out of 8? Should be plenty?:-)
    #3
  4. Kyron

    Kyron Purveyor of Thneeds

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    That’s what I was going to say :jack

    But yeah, plenty of heat and vice grips should do it

    Plan B is to use a small drill from the back side
    #4
  5. roger123

    roger123 Long timer Supporter

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    Dude, it's a KLR, you're good, what, 25Hp??? LOL

    I'd either go with a nice new set of vice grips and a ton of heat (thread locker) or grind a slot in it and use a very large perfectly fitting screw driver (with a wrench/ vice grips on the shaft) in the slot with a lot of heat.

    When you get it out ask yourself, "Self, why did I break this stud?"
    #5
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  6. Beezer

    Beezer Long timer Supporter

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    they are installed with thread locker.... needs heat to remove. the nuts had locker too, and they need heat too. as above Vicegrips will do it. re-install with locktite red
    #6
  7. Wasser

    Wasser Spilt my beer Supporter

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    Tack weld a nut to the broken off stub of threads sticking out. Use a socket to remove afterwords.

    It will come right out. Done it a bunch of times on exhaust manifold bolts in aluminum heads. The heat from welding loosens it up and the nut provides grip for a socket.
    #7
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  8. veetwo _tls

    veetwo _tls RENOVATIO:

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    Heat & stud extractor

    #8
  9. veetwo _tls

    veetwo _tls RENOVATIO:

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    if all fails drill from back with a "COBOLT drill bit"
    #9
  10. KirkN

    KirkN Long timer Super Supporter

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    What @H96669 and @Kyron said: don’t bother to do anything. 7 outta 8 will be fine forever! :D
    #10
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  11. KirkN

    KirkN Long timer Super Supporter

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    Wow, really!? I’ve never yet had a bike that used threadlocker that need heat on sprocket bolts! And, OP said he broke it while installing it, not while removing.
    #11
  12. Beezer

    Beezer Long timer Supporter

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    don't have to use heat on blue Locktite.... hell of a lot easier on red locktite if you do. there are parts on BMWs that used locker that is stronger the Locktite red ( Locktite makes some too) these you HAVE TO use heat or the threads will pull out

    I didn't say anything about why the stud broke.

    and I will repeat, the nuts have (red) thread locker from the factory. I've owned 3 KLRs, one I bought new
    #12
  13. dtysdalx2

    dtysdalx2 Just send it!

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    Right hand drill bit through the back side since it's a through hole. Heat and penetrant first of course.
    #13
  14. Kino

    Kino Adventurer

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    Thanks, i got this fixed :)
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  15. KirkN

    KirkN Long timer Super Supporter

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    What technique? We gots to know!!

    :D
    #15
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  16. dtysdalx2

    dtysdalx2 Just send it!

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    Yeah, buying a new hub doesn't count. Or getting a machine shop to do it.

    Bonus points if you used your teeth. :D
    #16
  17. Whodatschrome

    Whodatschrome Long timer

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    Well we know it wasn’t with a welder because, well, because KLR.
    #17
  18. Kyron

    Kyron Purveyor of Thneeds

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    We are waiting ....... :wave
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  19. KirkN

    KirkN Long timer Super Supporter

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    @Kino yer killin’ us down here! :lol3
    #19
  20. roger123

    roger123 Long timer Supporter

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    Those are studs set in the hub and nuts hold on the sprocket. They’re not bolts, I think he snapped the stud while tightening the nut.
    #20