1911 Premier 500cc
The first Premier motorcycle was introduced to the public at the Stanley Show, in november 1908.
Up to 1910 Premier used the White &Poppe engine, from 1911, an engine of their own design was used.
This 1911 design doesn’t completely follow 1911 practice, it has a unique feature namely an extra exhaust valve.
This spring-loaded valve is situated at the bottom of the cylinder and te idea behind the design is that it enhances the cooling of the engine by providing an extra escape for the hot exhaust gases.
There is a clutch in the rear hub to make smooth acceleration from standstill possible.