KDX, sorry mate i cannot find my old CR500 1985 crankcases, i must have chucked them out a few years back. i am looking for a 1985 CR500 clutch cover.
i do have a 1986 CR250 clutch cover spare - are they damaged during your process of pattern making / casting ? sorry for this question i have no idea of whats involved on reproducing these in alloy.