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Thread: 1985 250R Piston Damage

  1. #31
    Join Date
    Oct 2003
    Location
    Las Vegas, NV.
    --
    2,531
    I've never heard of that particular bolt being prone to breaking. As with any bolt that has snapped off, I'm sure it was just over-torqued. The only common issue, that I know of, is that the counter-balancer bearing holder ears are prone to cracking off, so you might consider replacing yours with a billet unit. Once your cases are split it should be fairly easy to remove the broken bolt.
    Red Rider's Sand Machine Updated 07/23/14

  2. #32
    Join Date
    May 2010
    Location
    Wichita, Kansas
    --
    1,361
    Slip a washer over the broken bolt/stud. Weld washer to broken part. Weld a socket or nut to washer.

    https://www.youtube.com/watch?v=fs7GTW4ZEDA#t=160
    Last edited by RubberSalt; 05-10-2015 at 02:05 PM.
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  3. #33
    Join Date
    Aug 2011
    Location
    Sacramento
    --
    41
    Cases are split already. This bolt is down in the hole where the case dowel is so can't weld to it. I might just have to try my hand at a left-hand drillbit and hope that it unscrews itself and that it isn't corroded into place


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  4. #34
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,738
    Doesn't happen to be the side of the case that needs the repair? If so add that to BDT's list when they weld up your case. Or, figure out the depth of the bolt hole, mark a pilot drill bit with some tape and be sure to drill dead nuts square. Then step up your drill bit size until you can get a bolt extractor in there. Good luck. In my findings there are two kinds of stuck bolts. Those that were over torqued (already mentioned) or those where the steel bolt and aluminum threads have galded together. 9/10 times you are screwed if metals are galded together and it's much easier to drill the whole bolt out and install a time sert or heli-coil.

    Here is a set of quality extractors that I use.

    https://m.mscdirect.com/mobileweb/pr...il?id=84968866
    Last edited by yaegerb; 05-10-2015 at 04:37 PM. Reason: Added link
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  5. #35
    Join Date
    Aug 2011
    Location
    Sacramento
    --
    41
    Unfortunately, the left side is the side of the case with the damage, and the right side is where the threads are broken. Maybe I'll get to it tomorrow after Mother's Day is over with.


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  6. #36
    Join Date
    Apr 2013
    Location
    snyder texas
    --
    456
    If you can get hold of a radio antenna that is sectional use that to help keep you straight and start small and step in size removing inner sleeves of antenna pieces as you go up in drill size. Will at least help keep it straight
    you know whats right therefore you know what is expected

  7. #37
    Join Date
    Aug 2011
    Location
    Sacramento
    --
    41
    Ok so I got it out today with a "Grabit" bit from Lowes. Thanks for all the suggestions


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