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How The Evolution Engine Saved Harley-Davidson From Bankruptcy
the Evolution engine. Harley-Davidson is 120 years old in 2023 ... These larger models would also see newer intake and exhaust systems, such as crossover pipes, to cut down on noise.
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The Intense Evolution Of Harley-Davidson's Big Twin Engines
From 1911 to 1929, the IOE (intake/inlet over exhaust) F-Head motor ... lead to the mighty 80 cubic inch Evolution engine, which served as proof that Harley-Davidson could evolve with a more ...