Piaggio Vespa Driveshaft PX (1984-Onwards), T5 125, Cosa, LML Star 2t-4tPiaggio Vespa Driveshaft PX (1984 Onwards), T5 125, Cosa, LML Star 2t 4t Sometimes changing the worn Driveshaft is necessary. Burrs on the cruciform cutouts and wear on the gears can cause quite a few problems, which will ultimately stop a precise gear change. Most of the time milage and riding style can cause issues with this., so changing this is a must! Make sure you check the threads as well, Damaged threads can cause the rear hub not to secure