1919 Harley-Davidson Model J
While early Harley-Davidson V-twins were plagued with many problems, this V-twin represents a very successful basic design produced from 1912 to 1929. Initially rated at 6.5 hp, its output rose to 8.68 in 1929. Racing models pulled 55 HP from a 61 cu. in. engine in 1915. Its withdrawal from the market because of high production costs nearly caused a dealer revolt. Racing versions of this twin easily topped 100 mph. A Model J set a class record of 103 mph at Daytona, FL in 1920.
Specifications: Engine–45-degree air-cooled V-twin; bore 3-5/16 in., stroke 3-1/2 in. Displacement–60.34 cu. in. Power Rating–8.68 hp.
Accession no. 1980G28.
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