Excelsior! Fastest arse in the world! This is the 'Silver Comet', prepared by Claude Temple to take the world speed record in 1931, with a supercharged 1000cc ohv JAP engine. Fast as it looked, it wouldn't break 170mph, so was retired... but what a looker.
For the tech-minded, the engine put out 100hp at 15psi blower pressure, at which point the blower was absorbing 15hp. It drove thru a 2 speed Burman gearbox built to withstand 120hp. Fuel consumption estimated at 5mpg, oil at 50mpg, using four oil pumps to liberally coat the machine for greater speed (oh all right). Paxon flexible saddle! All that power was controlled by a single lever on the handlebar, not a twistgrip throttle. One little finger controlling 100hp.
You'll note the gentleman on the Paxon flexible saddle has simply taken off his suit coat, and is still wearing the vest from his 3-piece and shiny street shoes. Avoirdupois over shiny aluminum.
