The early Simplex models were powered by a Model 40/50 hp four-cylinder, water-cooled engine. They were lightweight internal combustion engines and powered the world's first motorcycle. Their design was very versatile, and could be adapted to land, water, and air vessels. Top speed was in the neighborhood of 50 mph. A World Speed Record was set in 1904 at 97.25 mph in a Simplex.
The design was very advanced and the body sat much lower compared to other vehicles on the road. This, coupled with a wider wheelbase, made the Simplex safer and sportier and improved the vehicles handling. Located in the front was a honey-comb designed radiator which gave the vehicle a unique appeal. There was a four-speed transmission with a spring-pressure clutch. The elegantly designed bodies sat atop a steel frame.
The Simplex was a civilized vehicle suited for touring motorists. It was comfortable and refined, yet its sporty characteristics made it suitable for competition.
