With four applications this Guide,valve is the most specified part.
The Ring,snap is the cheapest item from this partsfiche.
Parts such as the Cylinder Head: Gasket,cylinder Head, Bolt,stud, Bolt(6x115), Plug,spark(u27esr-n) are included in the Xf650 1999 (x) (e02 E04 E17 E18 E22 E24 E25 E34) Cylinder Head parts fiche.