I have a question. I believe I already know the answer. I just want to see what you guys can tell me. A few years ago i rebuilt a XR200. It had some major engine damage from being ran without oil. I bought it super cheap. Anyway. I had the cylinder bored by a local shop and I replaced the crank bearings, rod bearing, rod, crankpin... and other things.. you get the picture. Of course i put a new pison and rings in it. I checked everything in the head out and it was all fine. After the rebuild it fired right up and ran great. It was smoking a little but being that i had just worked on it I wasn't worried too much. I ran the engine just like recommended for break in. It was still smoking. So I rode it a little longer and it just kept getting worse. So i pulled the engine out and pulled the top end off again. I found a couple of things that concerned me and I took the top end to the shop that worked on it to ask questions... Minus the piston and rings. I was told that i had installed the rings upside down. Now I know that i didn't. There was some damaged looking areas in the cylinder. I believe it was the shop that did something wrong when they bored the cylinder. Now my main question is.... what would happen if I did put the rings in upside down? What I mean mostly is what would it have done to the engine damage wise if anything. Explain what I would see if there was anything that would be obviously noticeable. Once I hear a couple of replies I will tell you all exactly what I found and why I think it was their fault. Please let me know.