Pressing Tin - How Harley-Davidson Makes a Gas Tank (photos)
The teardrop shape of the fuel tank if one of the most enduring design details of the Harley big twin, having first appeared before the war. Making this tradmark tank takes many steps, and some serious craftsmanship.
2. Dyna Gas Tank Build
A pre-cut 28 x 25 inch sheet made of American 18-gauge steel is positioned on a hydraulic press, which molds to exact specification the shape of the Dyna gas tank. Little has changed in the process from the past century; the die press is still gigantic, noisy, and uses tons of pressure. Some things have gotten more modern though, automated robotic laser beams cut out a more precise shape of this vessel.
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4. Hand Brazed-Seams
Not everything is automated though, the fuel fill cap is hand brazed to the tank shell. Pressure tests are performed checking stability and leaks. Quality control inspections are numerous and frequent in order to earn that Harley-Davidson medallion.
5. Tank Wall at the Harley-Davidson Museum
Hand painting pinstripes is one of the final steps in a long process that results in the fabulous signature paint schemes that defines the brand. Artisans use proprietary techniques and processes to make these gas tanks an individually crafted work of art. Hanging onto this expensive and time consuming process is another inspiration from Willie G. who believed a custom refined and aesthetically pleasing motorcycle was part of the motor company's core values. The tank wall at the HD Museum showcases 100 different designs hand picked by the Styling Department for historical and aesthetic significance, you can see them here.
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