I have a 4 month old 346xp (bought new in 2012)which never ran well from day 1. ##### to start. I should have looked into the issues in more depth but i am new to 2 stroke engines. No poor petrol went thru it, i only have mixed fresh petrol at 40:1. Dealer is taking no responsibility and quoted $480 plus GST plus labour So the piston is scored and needs a rebuild so i am after advice on the best kits available now for the 346xp. The opportunity to put a big bore kit on would be good if available. These are why I have found so far NEW CYLINDER PISTON WITH GASKET FOR CHAINSAW Husqvarna 346XP 346 353 350 44MM | eBay PISTON & CYLINDER ASSEMBLY KIT FOR HUSQVARNA 350 351 353 346 346XP 44MM REBUILD | eBay 346XP 350 353 chainsaw cylinder & Piston kit fits Husqvarna (44.1mm) | eBay and the big bore kit BIG BORE 45MM CYLINDER PISTON WT GASKET FOR HUSQVARNA 353 346XP 346 350 345 340 | eBay Luckily my father raced motorbikes for years and rebuild many 2 strokes so I will do the rebuild with him, should be fun. Also does any know the factory setting so i can set the 3 screws to once rebuilt to save a bit of time?