BSA 1911 Fixed Engine
BSA 1911 Free Engine
BSA 1911 TT Model
BSA announced 1912 models A, B, C and D in late 1911 as having interchangeable parts.
1912 Model A Fixed Engine 3.5 hp 2 Speed 500cc
1912 Model B Free Engine
1912 Model C Two Speed Free Engine
1912 Model D Tourist Trophy, SWB
1912 4.25 hp 3 Speed 550cc
1913 3.5 h.p models A, B, C, D and E were all available in France, along with 3 models of Duco sidecars.
1914 3.5 hp 2 Speed 500cc
1914 550cc 4.25 hp 3 Speed, Chain Drive
1915 4.25 550cc hp Chain & Belt Drive 3 Speed
1916 Model K 550cc 4.25 hp Chain & Belt Drive 3 Speed. Model K production ceased in 1916 but resumed after the war and continued into the 1920s.
1919 4.25 hp Chain & Belt Drive 3 Speed 550cc
1917 4.25 hp Chain & Belt Drive 3 Speed 550cc
1918 4.25 hp Chain & Belt Drive 3 Speed 550cc
1919 4.25 hp Chain & Belt Drive 3 Speed 550cc
