Anyone recognize this piece of metal? It was in the stock oil filter canister. I was changing the oil and the filter. I have a 4A that I am selling because it needs a new frame. Figured I'd get the engine running to make it more saleable. It ran fine about 8 years ago except for some black smoke but I attributed that to having to keep the choke pulled out to keep it idling and the fact that I put too much oil into the cylinders for start up. How could something that big (1&1/2") get in there? That item on the right was also in the oil canister. It's a stone???? Might be a good idea for me to drop the oil pan and see what's in there!