Editing Harley-Davidson JD

[[Image:1929 Harley-Davidson JD.jpg|right|thumb|1929 Harley-Davidson JD]]
The [[Harley-Davidson]] single camshaft JD model was a high performance machine that outsold every other Harley model between 1923 and 1929.  But by 1929 [[Indian]] and [[Excelsior]] had established the suitability of [[side-valve]] [[motors]] in terms of performance and production costs, so Harley discontinued the "J" series to concentrate on side-valves.  The [[pocket valve]] era was over.
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==Sidecar version==
[[Image:1925 Harley-Davidson JD Delivery Vehicle.jpg|right|thumb|1925 Harley-Davidson JD Delivery Vehicle]]
In the early years of the 20th century, America exported a great number of [[motorcycles]] to all parts of the world.  This 1925 [[Harley]] went to Australia, and attached to a box [[sidecar]], delivered cookies in Sydney, New South wales.  Refurbished in the 1990s it was used for publicity purposes, and the shelves in the delivery box are still stocked with "biscuits".

[[Category:Harley-Davidson motorcycles]]