Comparing the BSA A7 and Norton Model 7

Head-to-head on a 1949 BSA A7 Twin and a 1952 Norton Model 7.

The A7 powertrain went into a conventional lug-and-braze mild steel tube frame, with a rigid rear and BSA’s own telescopic fork at the front, though the frame did make somewhat ingenious use of the seat tube.
Photo By Robert Smith