Stratto port is blocked off by the gasket, exhaust port is half the size of oem, transfers don't line up at the same height. In take port seemed ok size wise vs husqy/zenoah. I got a little greedy/angry while fixing the ports and ended up just getting a husqy p/c for it. In truth, I could get a redmax gz4350 (543xp) from sthollers for ~$300.00 and just went and ran the saw. Time fixing the neojunk and new p/c, spark plug etc just wasn't worth it. If it runs at all in stock form rejoice and be happy. Mine ran like crap which lead me down that rabbit hole. Runs fine now, but not nearly as good as my gz4000.