I was wondering if a 1996 XR600 cylinder could replace a 1989 cylinder. I looked up the part numbers and the 1989 cylinder is part# 12100-MN1-672, and the 1996 cylinder is part# 12100-MN1-680. The cylinder and head gaskets are the same. I imagine the only difference is that the 1989 is nikasil plated, and the 1996 is not. Since my 1989 cylinder is a little out of spec, and it is nikasil, I was hoping I could use this 1996 cylinder. I have not purchased it yet, so I can't really compare side by side. Any info would be very helpful. Thanks.