AT BP RACING ATV WE DO NOT JUST SELL PARTS. WE TEST, TUNE, REPAIR, AND REBUILD EVERY ATV, UTV, SIDE x SIDE, AND DIRT BIKE MADE. IF YOU NEED ANY WORK DONE OR HAVE QUESTIONS CALL TODAY! FITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! GET AWESOME POWER FROM THIS TOP END KIT! Full race ported and polished cylinder head (no core required). Head assembly with stainless valves, springs, seals. 98mm big bore cylinder. 98mm 14:1 CUSTOM CP piston kit. MAXLOCK Heavy duty head studs. ARP 12 point head stud nuts. Cometic top end gasket kit. This kit will work with and 95mm (stock bore) cylinder and stock…