Hmmm, well that is not true. Stock I brought the bike home, put a cool head on it and started it, once warm I checked the compression with a mac gauge. Compression was 165 psi in both holes with 20cc domes. Ran it a summer and checked it again warm just before I took it apart to get ported and it was 157 psi both holes.
Had the bike ported and reassembled with wiseco pistons, ran it and checked it 162 psi both holes. Ran it for a weekend and checked it last saturday warm and it is 155 psi in both holes now.
Dont even tell me the rings are seated, I know they are.