Glossary  
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Atmospheric Inlet Valve: The falling of the pistons activates the opening of inlet valves by causing a vacuum. Usually found in the early single cylinder Harleys. >more
Big-Twin : A designation used for the larger sized Harley-Davidson engines. Sportster ® models range from 883 to the 1200 cubic centimeters. Almost all other Harleys have 1340, 1450, or 1584 cc engines. >more
Bobber: All extras and non-essentials are removed to increase the power to weight ratio. Increased performance and better styling was the result. Probably one of the first customized motorcycles from about...>more
Buell : First built by Eric Buell, a former Harley-Davidson employee, these are the v-twin Harley-engines bikes which helped the company win a share in the sports bike market. >more
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