Reply To: Large chunks on oil drain plug and underneath oil strain cap.
Jesus , that looks like something has seriously gone wrong with the bottom crank 😢😢😢😢
Have you removed the flywheel and the clutch baskets so you can use a torch or camera-scope (with torch) down any holes inside the engine to look for more places of where those broken pieces are found.
I think you might need a new crank or gearbox!
i am unsure of the Pistons , Rods , or cylinder valves until you look inside.