Parts such as the Air Cleaner: Cover,l Cleaner, Case L Cleaner, L,elemnt,cleaner, Screw,cross,5x16 are included in the Cb250k4 European Direct Sale Air Cleaner parts fiche.
The Honda AIR CLEANER has twenty-two products enlisted in the schematic.
In this schematic the "Grommeta,case" is used most often.