Stator/magneto exploding sent pieces everywhere and could have been fixed previously but never had oil pan dropped to be cleaned out. It was a known issue and that’s what I think is the green and yellow stuff. i would look at the stator to see if it’s one piece magnets not broken. Is the battery holding a charge?if those pieces ruined oil pump Oil starvation from that magneto/stator explosion could have been what cooked your clutchJust watched an entire motor rebuild I didnt see anything in the motor that looks similar to those bits and pieces. A mystery for sure.