Mercury Scott

 In the late 30s, a man named Laurie Jenks in Croydon, England designed and built what he considered to be modern motorcycle, fully enclosed with a cast aluminum frame, the motor he chose was perhaps not the most modern, the Scott 600 two stroke twin. He got further than most of us with the same idea, he had enough frame parts cast to build the five complete motorcycles, he completed 4, the last was sold as a kit after WW2 and completed in 1959.  The drawings below were done by one of Mercury Scott owners, Derek Moore. 

Article on the Mercury Scott by the Vintagent here.

The last motorcycle to be completed had a rear wheel enclosure fitted.

Mr Jenks also had his own ideas to modernize the Scott engine and came up with a set of rotary valves to fit.  

Classic Motor Cycle April 1984