36. Harley-Davidson Model 17F/J
Source: Harley-Davidson
Yes, this is the infamous motorcycle that helped the US Army hunt down Pancho Villa and his band of outlaws. The government liked them so much they ordered another 20,000 Harley Davidson model 17 F/J’s for World War I. Powered buy a 61 in.³ F head engine, which produced an astounding 15 hp, the F/J was a beast. The engine was coupled to a rudimentary three speed transmission, which was in turn mounted to the gas tank. The result was a lean, efficient war machine. Ultimately, you could outfit the Model 17 with hospital stretchers, automatic machine guns, passenger sidecars and shields. The added horsepower made terrain navigation quick and non-problematic.