Some items from this specific schematic: Pin(4x29.8), Lever,exhaust Valve No.2, Bearing(10x22x2.8), O Ring(d:1.9,id:14.5).
With a quantity of six pieces, the Screw 5x12 is the most used part in the EXHAUST VALVE (MODEL K1) diagram.
The Exhaust Valve (model K1) assembly is constructed from several parts from which the Valve Assy,exhaust Main is the most expensive.