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 include organized group rides, exclusive products and product discounts, insurance discounts, and the Hog Tales newsletter. A one-year full membership is included with the purchase of a new, unregistered Harley-Davidson. In 2008, HOG celebrated its 25th anniversary in conjunction with the Harley 105th in Milwaukee, Wisconsin. 3rd Southern HOG Rally set to bring together largest gathering of Harley-Davidson owners in South India. More than 600 Harley-Davidson Owners expected to ride to Hyderabad from across 13 HOG Chapters Harley-Davidson offers factory tours at four of its manufacturing sites, and the Harley-Davidson Museum, which opened in 2008, exhibits Harley-Davidson's history, culture, and