Parts such as the E-15: Spring,kick Start, Rachet,driven, Spring,kick Start, Washer,17mm are included in the Crf70f 2007 (7) De02-200 Japan (jdm) E-15 parts fiche.
The lowest price component in this E-15 parts-list fiche is the Circlip,ex16.
In this schematic the "Set Ring,20mm" is used most often.