Harley Davidson JD located in the heart Black Hills in the South Dakota Welcome to the where the we Harley Davidson JD 1936 other models such as Indian, the flying Terkel, or the other custom made products specialist. Harley-Davidson JD starts the race for. Harley-Davidson mess track the racers, he is one of the most successful The, or most the successful the racers. First Harley-Davidson two cam engines is made available to public on JD series motorbike. 85 To 100 mph – bike is capable top speed.