Ok I am completely mostly lol clueless on what in the world happened to my piston. I have an 01 engine me and a friend rebuilt did everything by the book fires up revs up and all. Took it out to break it in rode maybe 2 hrs tops off and on like 10 to 15 mins riding cool down then again so on, even put throttle limitter most of the way in. Now when we were breaking it in it was acting like it had no power running and pushin me with a little rpm but no where near what it should. Found out it was gettin oil into the crank side of the case and burning it off into the exhaust now I'm almost positive this was the issue for the bogging and having no power when we tried to break it in but please correct me if im wrong it. My question is why in the world did the first time we took my head off after idle for about a half hour total checked the piston and everything looked nice. Now after we found out that it was burning oil we were tearing it down again to reseal the case with yamabond and we took the jug off and my brand new wiseco piston looked awful! It has the tiniest but def fealable gash on the side of the ear and in some spots around the edge of the top of the piston are like dented real slightly. The top of the piston has really small dots all over it looking dead on the imprint thats on the head where the piston meets it. Please tell me are the dots normal and what in the world could have caused the dents around the edge of the piston the little gash looks like somethin came in from the reed cage but the piston rings are perfect not at all messed up and the cylinder wall is still perfectly smooth from fresh bore oh ya its been bored 80 over for 80 over you dont need any head work do you? i just dont get it please help! lol this rebuild has been drivin me crazy with the little bs going wrong