Got a set of P/C's that came off of the 2.0 I am rebuilding. One of the cylinders has part of a cooling fin missing. The pistons are stock U.S. spec. Should I keep them, toss them, or are they worth something to someone else? Thanks.

You can usually sell them for the cylinders. You can bore the cylinders and use them for 96mm pistons. Take a picture of the part number area. Should be down near the last fin (closest to the crankshaft, when installed).