Malossi Performance Variator for Vespa, Piaggio and Aprilia 50cc 4 Stroke Scooters. Includes 6.1 gram weights and contra spring. Get better performance out of your 50cc Scooter with this Malossi Racing Variator. Malossi is the top scooter performance company in the world, with multiple world championships. What they learn on the Racetrack goes into every product they make.