Of all the components used in this assembly the Cover, Crankcase 3 is the most expensive.
The most reasonably priced component used on the Xt660x 2005 1d24 Hungary 1d1d2-300g1 Crankcase Cover 1 is the O-ring.
This Crankcase Cover 1 diagram displays the required parts for the Xt660x 2005 1d24 Hungary 1d1d2-300g1 Crankcase Cover 1.