I don't want mine reaching 200C and get nervous at 190C; 180C is really my desired upper limit. Very lightly loaded at 200C (394F) might work but I have nothing to back that up. Heavy loading at 200C and above is a death sentence like T.O.M. said. We ran a DA50 at extreme temps and the ends of wrist pin were the first thing to go. It just chewed the ends up "real" bad. A new pin, piston, and ring and she ran like new but we learned a good lesson on that one.