Harley-Davidson changed the motorcycle industry after significantly improving motorcycle suspension and creating a subculture like none of its competitors, in this clip from Season 1, "Motorcycle Kings." Watch all new episodes of The Machines That Built America, Sundays at 9/8c, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. #TheMachinesThatBuiltAmerica Subscribe for more from The Machines That Built America and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch more The Machines That Built America on YouTube in this playlist: http://histv.co/TheMachinesThatBuiltAmerica Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Twitter - https://histv.co/Twitter More information coming soon! HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.