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1929 Harley-Davidson jd
THE STORY
As one of the penultimate generation of Harley-Davidson’s legendary J series V-twin motorcycles, this sturdy 1929 JD marked the final year for the F-head engine with which the Motor Company established its legacy. For its first three decades of production, the F-head design, also known as an IOE or Inlet-Over-Exhaust configuration, was central to the brand. The evolution of Harley-Davidson’s motorcycles brought significant changes over the years, though the marque has rarely positioned itself on the bleeding edge of technology. Instead, the founders of the famed “Bar and Shield” relied on steady, well-tested, incremental improvements to its machines to ascend to the top of the global motorcycle market.
With the first Harley-Davidson prototype in 1903, the F-head became the foundation of the brand’s reputation. When adding a second cylinder in 1909 proved unreliable, the V-twin project was scrapped, redesigned and re-released in 1911. The following year, mechanical intake valves and an optional chain final drive were added. It was in 1915 that the Motor Company’s flagship V-twin roadster hit the streets designated as the J series, equipped with the company’s first 3-speed transmission and electric lighting. The 61 CI (1000cc) J series became a benchmark motorcycle in America and a best-seller for Harley-Davidson from then on. In 1921, Harley introduced a 74 CI (1200cc) F-head for its robust JD line and quickly assumed its place at the top of the American motorcycling food chain.
Still, the the culture was changing. Smaller displacement machines were not only more accessible to more riders but were also more economical and efficient. Automobiles were increasingly affordable, and roads around the United States were dramatically improving, a fact that was making the smoother, quieter and cleaner running sidevalve engine configuration the favorable option. Indian transitioned to sidevalve engines in the early 1920s and, by the decade’
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