Abstract: A two-stroke internal combustion engine of the type comprising a cylinder exhibiting an internal cavity of substantially cylindrical shape, a reciprocating piston accommodated slidably and coaxially within the cavity, a cylinder head connect to one end of the cylinder, of which the inwardly directed face affords a combustion chamber in communication with the cavity, and at least one spark plug supported by the cylinder head, of which the ignition electrodes project toward or occupy the combustion chamber, characterized in that it comprises at least one injector passing through a side wall of the cylinder, of which the fuel spray nozzle is disposed substantially facing a given area of the cavity, and an electronic control unit by which the injector is activated cyclically.

Abstract: The steering device consists in a first hub to support the wheel, an internal second hub rotatably and coaxially supporting the first, a steering pivot accommodated internally of the second hub, on which the wheel can be swung from side to side, and an axle pivot, perpendicular to the steering pivot and suspended from the frame on quadrilateral linkages, which is able to rise and fall while remaining fixed in relation to the wheel; the inner hub is controlled by a lever that projects clear of the first hub and is hinged by its projecting end to a control rod, the rod in turn is connected by way of a mechanical linkage with the handlebars of the machine.