The CB350K4-5(72-73')models is a direct swap but they are difficult to find.. I bought one from a CB360 to fit my 350 before because it's so tough to find one for a 350 anymore.The 78' on up CB400 twins will work but different meter locations sort of, and the CB350F and CB400F too but the top looks different even though the triples fit good.I think I saw that the CB 250 would fit as well. Which other ones will fit?