The thirteen Pk50sm Wallaroo 2000 (y) Belgium / Dx Mp Sel Cylinder/cylinder Head component parts are all listed in this schematic.
A sample from the products for the Cylinder/cylinder Head include: Gasket,cylinder (nas), Spark Plug (br4hs, Cylinder D, Plug,spark (br6hs.
The most expensive part in this assembly is the Cylinder D.