The 1910 Pierce motorcycle was America's first four-cylinder motorcycle. The bike consisted of a heavy tubular frame that doubled as storage for fuel and oil. See pictures and learn more about the innovative 1910 Pierce motorcycle.
The 1975 Harley-Davidson XL-1000 and XR-750 were often altered so few remain their original state. The engine for the XR-750 racer was based on the Sportster but it had dual carbs and high-mounted exhaust. Check out these rare powerful Harleys.