Variable Valve Actuation comprising - a cam, - a valve suitable to displace between a closed position and an open condition caused by a rotation of said cam, and further comprising a main rocker arm suitable to swing over a fulcrum, mechanically interacting with said valve, by means of a guide profile, and wherein said cam interacts rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, wherein said variable valve actuation is obtained by means of - adjusting means (SPT, PT) arranged to relative move said fulcrum with respect to said cam; wherein said cam interacts directly with said main rocker arm and said fulcrum is movable, characterized in that said fulcrum is supported by a support piston (SPT, PT) of a hydraulic circuit; said piston being pre-charged toward a complete distension by means of a spring arranged in a chamber identified by said piston and wherein the hydraulic circuit further comprises an oil accumulator connected with said chamber by means of a branch pipe, wherein a solenoid valve is arranged thereon in order to control oil flowing from/to said chamber to/from said oil accumulator. - a cam, - a valve suitable to displace between a closed position and an open condition caused by a rotation of said cam, and further comprising a main rocker arm suitable to swing over a fulcrum, mechanically interacting with said valve, by means of a guide profile, and wherein said cam interacts rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, wherein said variable valve actuation is obtained by means of and further comprising a main rocker arm suitable to swing over a fulcrum, mechanically interacting with said valve, by means of a guide profile, and wherein said cam interacts rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, wherein said variable valve actuation is obtained by means of - adjusting means (SPT, PT) arranged to relative move said fulcrum with respect to said cam; wherein said cam interacts directly with said main rocker arm and said fulcrum is movable, characterized in that said fulcrum is supported by a support piston (SPT, PT) of a hydraulic circuit; said piston being pre-charged toward a complete distension by means of a spring arranged in a chamber identified by said piston and wherein the hydraulic circuit further comprises an oil accumulator connected with said chamber by means of a branch pipe, wherein a solenoid valve is arranged thereon in order to control oil flowing from/to said chamber to/from said oil accumulator. wherein said cam interacts directly with said main rocker arm and said fulcrum is movable, characterized in that said fulcrum is supported by a support piston (SPT, PT) of a hydraulic circuit; said piston being pre-charged toward a complete distension by means of a spring arranged in a chamber identified by said piston and wherein the hydraulic circuit further comprises an oil accumulator connected with said chamber by means of a branch pipe, wherein a solenoid valve is arranged thereon in order to control oil flowing from/to said chamber to/from said oil accumulator.