Street scooter Continuously Variable Transmission (CVT) belts for all sizes of GY6 based gas scooters, go karts, mini bikes, and dirt bike with automatic CVT engines. We have belts for 50cc through 250cc 4-stroke engines. Premium (Bando/KevlarŪ) & Gates belts have very strong fibers embedded in the belt that provide greater durability and decreased belt slipping. Premium (aramid/KevlarŪ) belts are the best belts you can buy for your scooter! Standard CVT belts are made of OEM-quality or better rubber embedded with woven cordage to provide strength. Variable speed belts (V-Belts) are dimensioned as follows:
669 (First number in the series) = The length of the belt in millimeters.
18 (Second number in the series) = The width of the belt in millimeters.
30 (Third number in the series) = The angle of the teeth on the belt.