Some items from this specific schematic: Rotor,inner, Oil Pump Assy, Pivot,oil Pump, Gskt,pump Body (nas).
The E-8 assembly is constructed from several parts from which the Oil Pump Assy is the most expensive.
The most reasonably priced component used on the Crf50f 2007 (7) Japan Ae03-170 (jdm) E-8 is the Screw,cross 5x10.