Malossi just released a set of outer plates for Vespa, Aprilia and Piaggio scooters. These compliment the Malossi Variator, and can be used with any other variator as well. They are designed to provide better cooling, and are more precisely balanced than the stock Variator outer plates.
For the Vespa, Piaggio and Aprilia 250 and 300
For the Vespa and Piaggio 125-150 3 valve engine