The Crankcase assembly is constructed from several parts from which the Crankcase 1 is the most expensive.
The most reasonably priced component used on the Yw100e 1999 4vpk Austria 294vp-300s1 Crankcase is the Circlip(1ey).
This schematic depicts all components used in the Yw100e 1999 4vpk Austria 294vp-300s1 Crankcase partslist.