Production in 1905 and 1906 were all single-cylinder models with 26.84-cubic-inch (440 cc) engines. In February 1907, they displayed a prototype model at the Chicago Automobile Show with a 45-degree V-Twin engine. Very few V-Twin models were built between 1907 and 1910. These first V-Twins displaced 53.68 cubic inches (880 cc) and produced about . This gave about double the power of the first singles, and top speed was about . Production jumped from 450 motorcycles in 1908 to 1,149 machines in 1909.