Kit now includes everything shown in picture- piston seat (sometimes known as dome gasket)  and kidney shaped gaskets.

All items fit 1971 & 1972 Honda 600 Coupe and 1972 Honda 600 Sedan, the carbs are stamped on the top near air filter bellows 718A or 718B.

 You also get an exploded view of the carburetor.  Please check my other listings for more Honda 600 parts.