I didn't understand what you meant when you said the lock was gone but now I see it. The tab is rounded off on the right bearing.
Like Bobby said clearances look like it was way too tight or it was starved for oil. Hard to get clearances that far off if it's oem bearings because they are generally in the middle (green).
Or it spun a bearing before and damaged the rod/crank and they just slapped new ones in and didn't resize the rod.
If you can hear a motor knocking, it's trash (at least the rods and crank are usually)
