Some items from this specific schematic: Frame-comp,rr, Cone,strng,stem, Bolt, Frame-comp,fr.
The most reasonably priced component used on the Kx250-h1 1990 Europe Uk Al As Frame is the Nut,pop,6mm,l=16.5.
On this parts fiche the Nut,pop,6mm,l=16.5 is the most specified component.