Ha ha nice pic Jako... the bolt of darkness! Well... a little mystery anyway.
Personally Bert, I don't understand why such a hefty bolt as we have on our swing arms (12.5mm dia.) are so delicate?
Maybe some of them, maybe only on certain years...were defective? I plan on torquing mine to factory specs (which I don't know other than what's been stated in this thread, but I will look up before torquing) and if it breaks, that must mean it was defective and failed the strength test!
Since I am somewhat inexperienced at motorcycle repair, I sought out advice of one whose opinion I trust about such things as swing arm bolt tightening, and have been advised not to go so tight as to leave any "binding" condition in the up and down travel of the swing arm, and also to carefully shake the swing arm by grabbing the rear of the tire in order to verify that there is no looseness or lateral play at the connection to frame.
Thanks for the offer on the AT-200 also Bert, but I really don't get too technical in my thinking about things. I got a PC-V and had the bike dialed in on a Dynojet dynomometer so I figure it's close enough!
Honestly, I don't have time for any of this stuff. I just couldn't resist the engine job by GHG/SB it just made so much sense to me... I had to do it! I've enjoyed all the mods I've done to date, but as soon as I get rid of my "wobble" I will be done. That's it. I will just leave it alone. Really. You can trust me...