The information is incorrect. This is a 4 stroke, not a 2 stroke.
This is not on ordinary Vespa. It is liquid cooled, 200 cc, front and rear disc brakes, and they don´t make it anymore. It´s the perfect weight and size for 2 people. Acceleration is smooth, and powerful. Hold on tight, as it will stretch your arms. I don´t know why it´s only got 50+ rating on this forum. My GT is awesome!