A Visit to Bathurst Motor Racing Museum (Mount Panorama Circuit

Some interesting cars and motorcycles in here.
Never seen a twin carb BSA Bantam, but one here, the extra carb is mounted on the side of the crankcase (must have a reed valve) The racer/builder also built a second racing Bantam and grafted a second 3 speed gear cluster (not on this one in the video) to give 6 speeds.