The outer diameter of the structure is 90 mm, the height 145 mm and the diameter of the tappet is 10 mm.
At high speeds, the valve spring simply can not keep the tappet or roller on the camshaft.
The valves are at the side and worked by tappets acting directly on a large-diameter two-bearing camshaft.
The company's ads claimed it lacked starting crank, change speed gears, clutch, cams, valve gear, tappets, and complications, thanks to electromagnetically operated inlet valves.
In an overhead valve engine, this tappet is fitted low down in the engine block.
Another reason is the large tappet clearance on the exhaust valve.
Light alloy is used for the valve covers, tappet blocks, sump and inlet manifolds.
The tappet clearances are maintained by the flow of the engine's lubricating oil.
