The 1948 Harley-Davidson S-125 motorcycle was Harley's offering to a postwar audience looking for inexpensive and reliable transportation.
At the close of World War II, thousands of G.I.s returned to the states hungry for wheeled mobility. Many had seen or spent time on Harley-Davidson's WLA military motorcycles overseas, and now craved one of their own.
With finances being tight for many, Harley decided to build a small, inexpensive machine for the masses. The result was the S-125.
With a single-cylinder two-stroke engine designed by DKW of Germany, this was not the kind of motorcycle most people associated with Harley-Davidson. Yet the company claimed 10,000 were sold in the first seven months of 1947.
Producing only three horsepower, the S-125 had a tough time reaching 55 miles per hour. Though a girder fork with coil spring was used up front, the rear had no suspension other than that provided by the sprung saddle.
But with a three-speed gearbox, foot shift, and hand clutch, the lightweight bike was simple and easy to operate. Many were "personalized" by adding the optional chrome wheel rims.
The following year the bike became known as the Hummer, and it continued with only minor updates through 1959, after which it was dropped in favor of more contemporary designs.