Complex sentence: The Moto Guzzi triporteurs were wheeled transport motorcycles (Triporteur) s brand Moto Guzzi, who in Italy were called "Moto Carri".
Split into simpler sentences: The Moto Guzzi Triporteurs were wheeled transport motorcycles (triporteurs) of the Moto Guzzi brand. In Italy, they were called "Moto Carri".