143cc Big Bore Performance Kit (60mm): - NEW Ceramic coated all aluminum cylinder (no steel sleeve) - Lightweight high compression domed 60mm piston with rings, pin, & clips - NEW Head gasket kit - Now includes the cylinder head o-ring set and an exhaust gasket. The all aluminum ceramic coated cylinder is lighter than a steel sleeved aluminum cylinder, reduces friction (increasing power), improves sealing, and provides better heat transfer (runs and cools down quicker). This new cylinder along with a complete head gasket kit and domed piston set this kit apart from other similarly priced 143 kits on the market. Affordable and will make your KLX110 or DRZ110 or Z125 a lot more fun to ride! High quality parts and requires no machining to the cases or other modifications - bolt on and go!