Of all the components that make up this Bottom Cowling the Bolt (682) has the lowest price.
Parts such as the Bottom Cowling: Bolt (661), Grommet 2, Lever, Clamp 3, Bolt Hexagon (676) are included in the 90etln 90etxn 1990 Bottom Cowling parts fiche.
On this parts fiche the Bushing (697) is the most specified component.