On this parts fiche the Set Ring,20mm is the most specified component.
The lowest price component in this Kick Starter Spindle parts-list fiche is the Circlip,ex16.
Parts such as the Kick Starter Spindle: Spring,kick Start, Washer,17mm, Spring,kick Start, Spring,friction are included in the Crf50f 2005 (5) European Direct Sales Kick Starter Spindle parts fiche.