This Head Assembly,cylinder is the most expensive of the items that make up this Cylinder Head assembly.
Parts such as the Cylinder Head: Head Assembly,cylinder, Plate,cylinder Head Chamber, Union,cylinder Head Oil, O Ring(d:2.4,id:45.7) are included in the Dr650r 1990 (l) (e2 E4 E15 E16 E17 E18 E21 E22 E24 E25 E34 E39 E Cylinder Head parts fiche.