i'm sorry, i thought i posted somewhere above about this: i did pull the piston/cylinder, about an hour after the seizure. there's a large, whitish mark, like a bruise kind of, on the piston, and a corresponding one on the cylinder. the rings seem totally fine though. also, when i run my finger over the cylinder wall, it feels smooth . . . so i don't know. i ran the kit today, it seemed alright. i'm scared to ride it fast though . . . hm