Yea I was riding hard but...
Lets talk about this. Are we redline riding? Miss a lot of shifts? Show your buddies the rev limiter? That looks like a case of (no pun intended) stretched rod bolts needing a swap out. Notice how the crank was well lubed, not 'dried scored' on Dogo's crank lets say.
For Dogo's case (again, no pun) I'd have to guess, there was not an oil starvation, but more a weak link that might be too many hours on a stretched bolt? Now, it is down to both of you. Dogo? Were you cranking it up when she let go? K9mike sort of admitted to some romping?
I mean, I do a littlelottall myself. I'm never close to redline, but hard load in 6th no less. So, low speed rpm lugging may not be as severe as high rpm, i.e., piston speed. That means, when the piston moves up, it wants to keep flying thru the head. Only thing that holds that rod from leaving the case are the piston pins and rod bolts, or, rod stretch.
Tormenting the motorcycling community one post at a time