Zenith Motorcycles

Zenith 1100cc Watsonian Combination

Another noteworthy detail of the Zenith is the method of enclosing the valve springs and tappets. These are encased in split tubes secured by quick-action fastenings. A single downward movement of the detachable part of each tube suffices to release it from its anchorage and discloses the tappet adjustment...

Zenith 1935 CP1100, Motor Cycling June 5, 1935.