Harley-Davidson models. In the late summer of 1929, Harley-Davidson introduced its 45 cubic inches (737 cm³) flathead V-Twin to compete with the Indian 101 Scout and the Excelsior Super X. This was the "D" model, produced from 1929 to 1931. Riders of Indian motorcycles derisively referred to this model as the "three cylinder Harley" because the generator was upright and parallel to the front cylinder. The Great Depression began a few months after the introduction of their 45 cubic inch (737 cm³) model. Harley-Davidson's sales fell from 21,000 in 1929 to 3,703 in 1933. Despite this, Harley-Davidson unveiled a new lineup
Harley-Davidson uses an all-new, liquid-cooled, 60° V-twin engine called the Revolution X. In the Street 750, the engine displaces and produces 65 Nm at 4,000 rpm. A six speed transmission is used. The Street 750 and the smaller-displacement Street 500 has been available since late 2014. Street series motorcycles for the North American market will be built in Harley-Davidson's Kansas City, Missouri plant, while those for other markets around the world will be built completely in their plant in Bawal, India. Custom Vehicle Operations (CVO) is a team within Harley-Davidson that produces limited-edition customizations of Harley's stock models. Every year since