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wheelsThruTime0014.JPG - A cut away "pocket valve" Harley-Davidson motor, showing the intake & exhaust valves in a pocket at the side of the combustion chamber. The exhaust valve is directly actuated by a push rod running against the cam; the intake valve is indirectly actuated via the external rocker arm on top of the cylinder.

A cut away "pocket valve" Harley-Davidson motor, showing the intake & exhaust valves in a pocket at the side of the combustion chamber. The exhaust valve is directly actuated by a push rod running against the cam; the intake valve is indirectly actuated via the external rocker arm on top of the cylinder.
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