Features: Cast piston with flat head. 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. Cast piston kits are gravity-cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston. All rings are OEM replacements. Replacement two-stroke piston rings sold individually; four stroke piston rings sold as a set.
