As was mentioned, the entire engine needs to come apart and jet washed.
The cause for the flat cam can be hard to figure out, But you don't want it to happen again.
Let use know all the facts you can about your engine,and the initial start-up. what oil and additive did you use in it???
Led footing WILL NOT hurt the bearings. Correctly built...You can spank that engine like a 4 year old in wal-mart with no problems.