5. 1924 Moto Guzzi Normale
Moto Guzzis are quirky, odd and charming at the same time. The Guzzi fan base is a similar set with a deep devotion to the brand. And it all started right here. The 1924 Moto-Guzzi Normale was the first motorcycle designed and manufactured by Carlo Guzzi. It features a horizontal, 498cc air-cooled single-cylinder engine with an external flywheel, making just eight horsepower.
Guzzi stuck with the horizontal Single and external flywheel design for more than 50 years, in both touring and racing machines. The iconic transverse Twins were introduced in the meantime, but when the final 500cc Guzzi Single rolled off the production line in 1976, it still retained the same bore and stroke (88 x 82mm) of the Normale above.