Just want to let you know even though you all look at poulan saws as junk. This 2000 year poulan 3750 60cc that had a burned up top end is now my little homeowner monster now with the ideas you guys have on this site. It was my first time messing with one of my 2 saws. Yes both are poulan 2.0 and 3.7 and never had to touch the 2.0 10 year old one yet. But to the good stuff I just went and tried out the new top end in a 40" willow tree that I been meaning to finish up. I put a new ring, polished scored piston on exhaust side, polished out scoring on cylinder on exhaust side. Then honed cylinder and opened up exhaust port then polished the inside of the exhaust port. Muffler mods, took out diffuser and spark arrester, Opened up inside muffler. Carb work, took the limiter caps off and did a carb retune. Wow what a difference. I buried the 22" bar and never let off during the break in of new ring, after warming up. It pulls all the way through with the 22" bar buried now without any bogging. I also went from 40-1 to mixing at 30-1 now also. Better then new ever thought of being. Glad I tried the rebuild now. Was wanting to get a newer saw, but the prices of the 54cc-60cc saws scared me to death. Thanks all for all the great ideas on this site. Not afraid to work on it anymore, just scared of my saw while running now. lol