Polini Motori has produced the new Maxi Speed Control: a project that’s been carefully researched and designed to guarantee top performance and satisfaction for the owners of maxi scooters. Based on Polini Motori’s great experience in developing racing bike transmissions, Maxi Speed Control is made from ultra-pure materials and features cutting-edge process designs, to guarantee long life and improved mechanical functions, fully exploiting the torque and the power of all scooters Compatible with: - Yamaha: Majesty 400 09-_S, X-MAX 400_S