Features: Pro Replica – Forged piston in original OE form. All pistons are heat-treated with a T-5 hardening and tempering cycle . All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life . Forged pistons are forged from 2618 aluminum for superior strength and durability . Forged Replica pistons are forged OE replacements . Replica pistons and all rings are OEM replacements . Top end piston kits include piston, rings, wrist pin, circlips and top end gaskets . Replacement two-stroke piston rings sold individually; four stroke piston rings sold as a set.