Moto Guzzi is an Italian motorcycle manufacturer. They typically dont make mopeds. During the late 70's the did a joint venture with Benelli. Benelli supplied the motors and they used primarily CEV parts. The frame was made by Moto Guzzi. There are 2 moped types that Moto Guzzi made, the American version called the Robin and the Italian version called the Chiu. Some of the parts are interchangeable but not all. For example the exhaust on a Chiu was a traditional pipe and baffle design. The Robin was different with a smaller pan style exhaust.
The motor is the same as the Benelli G2 motor. The clutch is the same as a 2 shoe puch. A 1 speed transmission is all these mopeds came with.
The odd part about Moto Guzzi and Benelli moped with this motor, is that the drive chain and the pedal chain are on the same side. If you are on the moped the chains will be on your left side.
These motors came with a 14.9 SHA Dellorto carberator. Some also have the 14.12 carb and the intakes change respectively.
As stated before the tailight, headlight, and speedo are CEV parts.