The steel body is the hallmark of the Vespa, as it remains almost unchanged in its structure to the whole production. This is a real body that is well suited to the definition of "small two-wheeled vehicle" given by the same Piaggio. The first engine, that of 98, has a power of 3.2 bhp at 4500 rpm while the next 125 the power increases to 4.5 bhp at the same speed. The engine is a single cylinder 2-stroke horizontal cooling is forced air, the gasoline-oil mixture is 5%. The model 98 is devoid of the rear suspension while the front one is a tape spring. Lacks even a tripod. The 125 is more comfortable, the front suspension now has a coil spring and a hydraulic damper and the same goes for the rear suspension first missing, appear also the stand.
There are several possible conformations with regard to the seat and accessories: switching from one single front seat, the front seat with rear carrier, the dual seat (front and rear), the possibility of fixing a spare wheel on the rear luggage racks or to hook a truck trailer rear.