SMITTY wrote: So I yank the cylinder block off, and find a scorched piston & stuck rings. ...... Worked at it with a pick for about an hour,
Fun stuff Smitty! Maybe I told this story already? I was at a national Observed Trials motorcycle even in PA back in the mid 90's. We camped on site for the two day event. The first day a friend dumped his bike, the throttle stuck open and it revved until it seized. One fellow found some muriatic acid at a hardware store & we tore into it that night. He was hoping to make it run enough to limp through the Sunday event. I got the job of cleaning the piston. While they used the acid to remove aluminum from the cylinder wall I picked at the rings. The bottom ring only took 20 minutes, but the top one....ohhhh, gosh.... you couldn't even see a third of the ring as it was buried under melted aluminum. I picked and scraped, filed and sanded. It took over an hour to remove it, but I didn't break it! We were kind of planning on running with one ring, but after a while it actually cleaned up pretty well. It was after midnight when we got it back together so we couldn't even test it. The next day.....it ran! Not only did it run, it ran well! We rebuilt that engine using no new parts whatsoever.