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| 1980 CR 250 Swing Arm bolt... stuck. https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=3782 |
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| Author: | scottyboy [ Tue Aug 28, 2012 10:18 pm ] |
| Post subject: | 1980 CR 250 Swing Arm bolt... stuck. |
Hey Everyone, I just started my first attempt at doing a resto on my 1980 CR250. Everything coming apart pretty easily until I got to the swing arm bolt. It turns freely inside by it won't budge. I've used a piece of wood and beat it with a hammer but it's stuck in there. Any ideas, or is there something else I'm not seeing? Thanks |
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| Author: | redrocket190 [ Tue Aug 28, 2012 11:40 pm ] |
| Post subject: | Re: 1980 CR 250 Swing Arm bolt... stuck. |
Heat? Penetrating fluid - lots of? I suspect the bolt is welded to the sleeves that sit inside the swing arm bearings and/or the needle bearings have come apart and jammed. Worst case you may have to spread the frame and saw through the bolt... |
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| Author: | rayivers [ Wed Aug 29, 2012 7:07 pm ] |
| Post subject: | Re: 1980 CR 250 Swing Arm bolt... stuck. |
+1 on the heat (use plenty of it!) and penetrant. Since your bike uses relatively short bearing sleeves instead of a full-length one, you might get lucky. My MR swingarm uses a full-length sleeve, and I tried on and off to remove it for nearly three years (orange-hot heat, penetrant, freeze spray, power chisel, sledgehammer, etc.). I finally drilled out both ends of the pivot bolt and hammered a chisel between the frame and swingarm to cut off the hollowed-out bolt ends. It took about 3 hours, with no frame damage at all. Ray |
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