The twenty-four Dr-z400 2001 (k1) Usa (e03) Drz400 Dr Z400 Fuel Tank (model Y) component parts are all listed in this schematic.
The Fuel Tank (model Y) assembly is constructed from several parts from which the Tank Assy,fuel(yellow) is the most expensive.
The most reasonably priced component used on the Dr-z400 2001 (k1) Usa (e03) Drz400 Dr Z400 Fuel Tank (model Y) is the Screw 6x12.