@SFOMuseum Twitter Posts This is SFO Museum's archive of the @SFOMuseum Twitter account.
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In 1903, Curtiss introduced one of the first two-cylinder motorcycle engines, a powerful five-horsepower, V-Twin design that boasted a greater power-to-weight ratio than a comparable single-cylinder engine. #EarlyAmericanMotorcycles . This tweet was posted on May 21, 2021.