Il caso Moro
Honda, transversal V-four engine. V-Four? CB 400 F, plutôt...
Studs on the seat cover = 400/4, can't tell if it's an F1 or F2 because of the repaint
Vu la largeur du moteur sûrement un six cylindres Benelli (ou Honda)
Definitely Honda CBX. This model only had a short run beginning in 1978 and ending I am not sure exactly when but about 1982. If you call it a 1978 you won't be far wrong.
The red bike.
Suzuki 400 or 250 twin from about 1985.