Ariel unveiled the all new SQ 4 to the motorcycle world at the Olympia Show in 1930.
It was a brainchild of design genius Edward Turner and it was powered by an OHC engine with 2 parallel crankshafts, mounted in a crankcase transversely across the frame.
The two cranks were geared together in the center uf the unit, so in effect there were two v..
WANTED Fabrique Nationale (FN) car & motorcycle parts 1907 - 14
Interested in parts or info for 1907 - 1914 FN cars. Shown in the second photo are the brass steering column flange, aluminium 5 spoke steering wheel ..