I’m not sure of all the differences between the 1928 Fastwin H 12hp
I’m currently working on, and the 1929 ish Fastwin 14 hp I also
recently acquired, but the 29 has a choke lever like yours, but
of course the “half moon” detent cage is 90% “gone”.
Now that I seen your photos George, it all makes sense.
I noticed in the specs that both above mentioned motors have
the same bore and stroke, and their HP both rated at 4000
RPMS, so I’m not sure what they did to increase it two HP
in 1929? Carburetion, prop?
Prepare to be boarded!