With a quantity of four pieces, the Grommet (6a0) is the most used part in the BOTTOM COWLING diagram.
Parts such as the Bottom Cowling: Washer,plate (6k8), Bolt (716), Lever, Clamp 1, Grommet are included in the 50etsn/etln 1984/1985 Bottom Cowling parts fiche.
The lowest price component in this Bottom Cowling parts-list fiche is the Bolt (682).