Those are some crazy fairings ..looks to be hand pounded aluminum.. talk about duck face . Woody Woodpecker paint job would work
Think they're NSU. 125's from the tire size and single exhaust. Probably running straight castor oil. Recall reading about one make of Italian bike (Ducati, Guzzi?) of same vintage where they would heat the oil up on a stove and then pour it in hot; only way to get it to start.