Take, for instance, this rowdy Knucklehead chopper from Custom Works Zon. Yuichi Yoshizawa and Yoshikazu Ueda took a 1947 Harley-Davidson powerplant and used it as the basis for their build.

Operating out of Minnesota since 2004, Union Speed & Style specializes in upholstery and metal fabrication for both cars and motorcycles. The firm is led by one Jordan Dickson, who is joined by a ...

Jay Leno's 1936 Harley-Davidson Knucklehead had already been sitting for years when he bought the it, and the former Tonight Show hostleft it resting for a few more decades in his own garage ...

In 1948, Harley-Davidson debuted the Panhead engine, a big step up from the earlier Knucklehead. There were quite a few highlights: aluminum cylinder heads with bronze valve inserts and steel ...

Introduction of the Evolution engine saved Harley-Davidson in 1984 ... valve engines that could trace its lineage to the ...