669-18-30 aramid (Kevlar ) belt This scooter part is a high failure item due to the stresses placed on the belt by the CVT Description 669-18-30 aramid (Kevlar ) belt. This scooter part is a high failure item due to the stresses placed on the belt by the CVT. Fits most 49cc – 50cc automatic CVT street scooters. Size 669-18-30 CVT belts are typically used on 49cc – 50cc 4-stroke GY6 scooter engines. Specifications Length: 669 mm (26-3/8″) Width: 18 mm (11/16″) Angle: 30?? Material: Aramid (Kevlar )