It looks like carbon buildup mostly, not actual pitting, but it's hard to tell on a little screen. If you mean your engine was leaking on the clutch side, that could've been the entirety of the issue. Was the exhaust smoking a lot? Did it get better when it warmed up? Since you've already got it apart a new wrist pin, circlips, rings, and a hone would be nice. But you should have the bore checked as it could've been burning oil that was slipping into the combustion chamber. Could also be valve stem seals, but in either case there should be smoking, otherwise it's probably just an oil leak. I hope you had more to go on than just an oil leak before you disassembled.