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 low-maintenance motorcycle. The resulting single-cylinder Buell Blast was introduced in 2000, and was made through 2009, which, according to Buell, was to be the final year of production. The Buell Blast was the training vehicle for the Harley-Davidson Rider's Edge New Rider Course from 2000 until May 2014, when the company re-branded the training academy and started using the Harley-Davidson Street 500 motorcycles. In those 14 years, more than 350,000 participants in the course learned to ride on the Buell Blast. On October 15, 2009, Harley-Davidson Inc. issued an official statement that it would be discontinuing the Buell line and