Committed to bike racing in 1914, Harley Davidson soon began to take the sport seriously. Special eight-valve racing twins were introduced in 1916. The cylinders and heads on the eight-valve racers were the work of British engineer Harry Ricardo and featured a hemispherical combustion chamber that had been developed on airplane engines during WW1. The bike shown here is a 1920 version with
Harley Davidson 1920 Eight-Valve Racer
Committed to bike racing in 1914, Harley Davidson soon began to take the sport seriously. Special eight-valve racing twins were introduced in 1916. The cylinders and heads on the eight-valve racers were the work of British engineer Harry Ricardo and featured a hemispherical combustion chamber that had been developed on airplane engines during WW1. The bike shown here is a 1920 version with
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