The most expensive part in this assembly is the Cylinder.
A sample from the products for the Cylinder include: Stud,m6x1x32, Cylinder, Pin, O Ring(d:2.5,id:13.8).
The most reasonably priced component used on the Gsx600f Katana 1990 (l) Usa (e03) Cylinder is the Stud Bolt L:20.
