Since the escape of the intake valve is carved in the upper part of the cylinder, I made it with leutor.
The left side is the genuine cylinder, the right is the self made cylinder.(It is a photo on the way of carving.)

I tried putting a piston.

OK！

I also confirmed the rattling feeling at this point, but there is no rattling feeling.
It was rattling when it was an old cylinder.
It’s a really nice feeling.

Because bowling was completed, I perform the lapping of the valve.
I removed the valve and observed the valve face and valve seat.It is receiving damage.

This is a valve seat.

This is the valve face.

I attach a valve compound and do lapping.
The sucker is called a valve octopus.

There are 16, too.

I completed the work in a few hours.