Been meaning to call you and tell you about a theory I've got about that Sean, I came across it while I was doing my swingarm. I could be wrong but I don't think so, I'll try to give you call soon or send an email. I'm limited to stock diameter for my shaft (200 rear tire centered) and every single one I pull out of my bike is spiral cracked like a candy cane, really hard to see it but it's usually there. I think it's more of a length and partially geometry problem, but mainly length.