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"When one thinks of Harley-Davidson engines, thundering V-twins is what usually comes to mind. Read this article to learn the 6 unique Big Twin design generations over the history of the Harley-Davidson company and the details for the smaller motors."^^<http://www.w3.org/2001/XMLSchema#string>
<http://auto.howstuffworks.com/harley-davidson-engines1.htm>