Originally Posted by Gray Beard

I have had a rod break in one of my YS engines, it was well used though and it was just stressed over time and use. It didn't break the case though. I just replaced the piston and rod and all was well again. I have also had the crank pin break on a SK two stroke, that was just quality control from China, it was under warranty and was repaired for free.
In your case I would post the photos in the OS support forum and ask Bax about it but being on the net and only photos I don't think it will help a bunch. At least Bill can point you in the right direction about what to do with it.