To control the tightness of the valves, their seats are covered with a thin layer of Berlin glaze or white lead. Insert the valve and press lightly against the seat.
Attention: The valve must not be turned. If the paint is not evenly distributed over the valve seat, then the seat must be machined.
Valve sizes
1) The total length of the valve can be ground off up to 0.5 mm.
2) Overall length of the primary intake valve.
3) Overall length of the secondary intake valve.