Indian Motocycle Manufacturing Company color options in 1934. Models of that era had Indian's famous war bonnet logo on the gas tank. Indian's huge Springfield factory was known as the Wigwam, and native American imagery was much used in advertising. In 1940, Indian sold nearly as many motorcycles as its major rival, Harley-Davidson. During this time, Indian also manufactured other products such as aircraft engines, bicycles, boat motors and air conditioners. The Indian Scout was built from 1920 through 1949. It rivaled the Chief as Indian's most important model. The Scout was introduced for 1920. Designed by Charles B. Franklin, the Scout had its
Harley-Davidson Evolution engine until the introduction of the Twin Cam engine, the last of the line of single cam, overhead valve motors tracing their lineage back to the seminal Knucklehead design penned by founder Bill Harley. It is also the largest aftermarket supported Harley-Davidson design, to date, with clones of the engine being produced by third parties like S&S Cycle and several others. Harley reverted to a single cam design with the Milwaukee-Eight engine, first introduced for touring models in 2016. Harley-Davidson Evolution engine The Evolution engine (popularly known as Evo) is an air-cooled, 45-degree, V-twin engine manufactured from 1984 by Harley-Davidson for