Harley-Davidson Engine Timeline. The 1st four engines were in alphabetical order, that's how I remember. Flathead, Knucklehead, Panhead, Shovelhead. http://kiwav.com/?utm_source=pinterest&utm_medium=organicpin&utm_campaign=hdenginetimeline

Harley-Davidson Engine Timeline. The 1st four engines were in alphabetical order, that's how I remember. Flathead, Knucklehead, Panhead, Shovelhead. http://kiwav.com/?utm_source=pinterest&utm_medium=organicpin&utm_campaign=hdenginetimeline

Pure connection to the road. #DarkCustom | 2016 Harley-Davidson Roadster

Pure connection to the road. #DarkCustom | 2016 Harley-Davidson Roadster

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