You Might Also Like
The 1931 Harley-Davidson Model D switched from F-head to flathead (side valve) V-twins. First was a new 45ci model to compete with the Indian Scout. The next year the 61ci and 74ci Big Twins were changed to a flathead design. Read about the Model D.
The Japanese-built 1974 Yamaha RD350 motorcycle was light and very powerful for its size. It featured a a broader power band than most. Get specs and information for this motorcycle.