Thanks Bill. It snapped off right at the thread, so turning the head did not work it out. Lightly tapped it and it came right out. Now waiting on the parts I have never had the swing arm off, so not sure how this happened. Bike had 19K miles on it when I bought it 3 years ago, has 48k on it now.
Well, I took the cover off to check again after 2k miles with the replacement and it is broken again. Any thoughts on what would be causing this? I ride solo and weigh about 185lbs so I don't think that is the problem.
As for the bolt, the strongest commercial-quality bolt is grade 8, marked by six raised dashes; its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi. Torque it to 65 lbs.
I was just using the oem part, so I don't know what its grade is. I did not use a torque wrench last time, I will be sure to use one for the replacement that is on the way. Yes the broken end and nut were still in the cap.
I am not sure what to check, but I just relubed the bearings, and the shaft seems to rotate smoothly. Both times it was broken right at the end of the nut, so I am going to assume the one I installed was over torqued. I don't see how it could be shearing there for any other reason unless there is side to side stress. When I get the replacement I will torque it to specs and inspect daily to see how it goes.
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