Yeah, back in the day....In my case last year. #1 cylinder started loosing compression so I removed the head and discovered the problem. The cylinder and the piston were scored for some damn reason. I'm guessing I got a piece of wire in that cylinder when I was wire brushing the tops of the pistons and valves the previous year when I installed the engine. Anyway...I found a box of 6 pistons with wrist pins and rings 60 over like my engine is on eBay for cheap. I removed #1 Piston and honed out that cylinder and installed the new piston. So far so good.