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 VRSC Harley-Davidson VRSC The Harley-Davidson VRSC (V-Twin Racing Street Custom), or V-Rod, was a line of V-twin muscle bikes, produced by Harley-Davidson from 2001 until 2017. It is notable as the first Harley-Davidson street motorcycle to feature a modern engine with DOHC and liquid cooling. The VRSC models were absent in Harley-Davidson's 2018 model line announcements. The VRSC was introduced in 2001 in a single model called the V-Rod. The V-Rod was developed to compete against Japanese and American muscle bikes. The "V-Rod" made use of the Revolution engine, developed jointly with Porsche that, for the first time used overhead cams