The “Sembra Una Vespa” scooter of course !
The most striking feature was its well-endowed posterior which would make Kim Kardashian green with envy. That bulbous rear housed a superlative two-stroke engine that was mounted off-centre (biased towards right side) and directly coupled to the rear wheel.
This off-balance design meant that riders had to slightly tilt the whole scooter to the left while on the move. The engine emitted a solid thud-thud sound, as opposed to the Milo-tin whine of prevailing Japanese two-strokers like Yamaha and Suzuki. Torque was plentiful and its acceleration was pure exhilaration. And, no visible smoke emission despite having to mix in a 2T lubricating oil with the fuel ! Amazing.
Over the years, a cult-like following has grown around this cutesy Italian Job.