Outer Variator Pulley for Vespa, Piaggio and Aprilia Scooters with Piaggio 50cc two or four stroke engine. 

The higher the mileage of the scooter, the more the pulley´s frictional surfaces become worn. This adversely affects the Belt and can lead to the danger of it tearing apart completely. As soon as you discover these inevitable signs of erosion, the pulley unit should be replaced.

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