BSA Flathead. Check out the Zep on the right Motorcycle and Zeppelin BSA V-Twin 770cc Flathead, 1935 Model
These photo’s were taken at Bonneville about 6 years ago. Tom Bolitho sent them to me before he died. He was on a race team and took these photo’s because he knew I love flatheads and motorcycles. He told me the owner of this thing just rode in off the highway, checked out the action for a while and then rode off. This was the prototype. It seemed to work just fine. One speed with clutch.