Pieces of steel in cylinder??

Do you all think its bearing material?
That crank journal should be destroyed if that was the case.imo
Who put it together, that is the question I wanna know. Measure the crank and see if the bearings are even matched.
Muat'a been a loose std someone put a .010 under bearing into to do this kinda damage .

"Motor ran great till one day"

Fishy AF. Imo
At first that seemed plausible, but there is just too much of it. And I too have never seen a bad bearing without crank damage. The color of the material is exactly that of solder or fresh cut lead, and the shape of the globules in the crankcase is exactly how solder blobs up; either would be soft enough to not score the crank. Maybe some clown put solder or lead behind a bearing shell LOL

I'd be checking all the bores of everything for size.