I was given a 346xp a few months ago. Saw runs if you care to yank the cord long enough. I took it to the saw shop and they said low compression and piston pretty bad scored up. My guess is the saw was ran with a dull chain more often than not. Claimed only fix is a rebuild. Anyways, I saw the scorched piston for myself and since I have a 365xp and a 55, I decided to just shelf the 346 for a while. Well, it winter and I am thinking about a rebuild for the saw. Since the saw was a gift, I figure I can throw a little money at it. Started looking at the rebuilt kits on fleabay and gave up because I dont know enough about saws to know which kit to buy. Saw is a 346xp/xpg 45cc. Serial is 2hvxs.0454ab. Can anybody tell me what year model this is. I was also thinking about the bigbore kits offered and some reading on here says those kits are for a 350, will bolt on, but result in less power. I could use a little advice about going that route with the rebuild. Then there is the part about the 42mm/44mm/50mm piston kits. Really confused me so better to ask before spending any money. Another question I have is, If I go with a bigbore kit, does that mean I also need to buy a larger carb, or can I use the one I have with proper tuning. I have rebuilt everything from 350 chevys to 6068 JD, to briggs and straton, but have never rebuilt a chainsaw. Figure I can do it, but if I need to, i can just take it to the saw shop and let them do it.