always look on the bright side of life? Maybe it's a good thing the previous owner was ham fisted. I started changing out the exhaust studs etc as recommended in my other Buell thread. The PO had insisted on repairing an exhaust leak before we traded bikes. I said leave it alone but he did it anyway. I found the front cylinder exhaust studs were finger tight. The rear cylinder only had a nut on one stud and the stud without a nut was cross threaded. I pulled the head off to get better access to the stud and found this. Scratches can be felt with a fingernail in the band the red arrow points to. The piston The different colors are not a reflection. So, do I need to strip it all the way down and hone the cylinders and install new pistons?