Wonderful bike, always garaged, well maintained. Low mileage,black and teal, Memphis shades windscreen. Unique Engine: This bike attempts to duplicate the Harley-Davidson experience by using the single pin crankshaft design that Harley is so well-known for. The single pin crank design attaches both pistons to the same pin on the crankshaft which means they rise and fall at the same time. This results in the unique boom boom boom sound that Harley's make.