The intake valve and seat are unique. This is an atmospheric system requiring no external pushrod. The intake open on the downstroke of the piston. The valve is sucked open during this. This assembly is comprised of several parts. Here is the complete setup (on the right) and some extra parts.
This pocket assembly slides intot he top of the cylinder. There is a pin that prevents the pocket assembly from rotating once installed.
Before the pocket assembly is installed a copper gasket is needed. Here is the old one. I have some new gaskets being made before I can install this.
Cannonball, Chase, 1911 Excelsior, 1923 Harley J tales 
Hola
Estuve leyendo tu articulo y hay cuantiosas informacion que no sabia que me has
aclarado, esta maravilloso.. te queria devolver el tiempo que dedicaste, con unas infinitas gracias, por instruir a
personas como yo jejeje.
Besos, saludos
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