In fact, the manufacturer had an entire line of head-themed engines, including the Knucklehead, Panhead, and Shovelhead, with some featuring in the rarest Harley-Davidson motorcycles ever built.

Currently operating as Satomari Motorcycle, Yusaku and his crew have a strong affinity for one marque in particular, that being Harley-Davidson ... bobber holds a 1982 Shovelhead powerplant ...

However, the engine was discarded altogether for the following model-year, making way for the smoother and more powerful Shovelhead ... It is a 1966 Harley-Davidson FLH Electra Glide with 28k ...