This aluminum cylinder head is new, it is sold naked. Before mounting on the cylinder a break-in of the valve is imperative. To do this, simply do it either with a special break-in tab or with toothpaste as they contain small particles allowing the break-in.
This break-in is necessary because the valve seat is rough cast and must be made with the valve that will be in place.
The lot includes: - The breech - 4 bolt spacers - 4 x 9mm hex head bolts (original type) - 1 valve with spring and brass nut
This cylinder head is mounted on VéloSolex 2200 3300 3800 5000