Background
The ‘W’ series of Harley motors was introduced in 1937 as a follow-on to the Model D twins. Named for its flat-topped, vented cylinder heads, the 737cc (45 cubic inch) V-Twin ‘Flathead’ in WLA form gained a true workhorse reputation during World War II, with its rugged dependability. The ‘WL’ was the ‘Sport Solo High Compression’ version, whereas the first ‘WLC’ models were originally produced for the Canadian and British forces. The Flathead was seen in various forms right up until 1973, making it the longest running production engine that Harley Davidson has ever made.
At the end of hostilities a motorcycle was the first thing many of the returning GIs thought of when faced with the hum-drum world of civilian life, either in the form of an ex-military WLA or WLC, or a newer civilian version based on the military bikes. Harley were quick to draw on the bike’s military credentials, it’s easily tuned motor and its dirt track racing prowess in the marketing material of the day. However in everyday use they were easy to live with, with their relatively low compression side valve motors making them easy to swing into life, and a simple rugged nature making them a great long-term companion.







