Polini Kelvar Belt for scooters and go karts with CN250 / CFMoto 250cc enginesP 248.025 – Works well with Hammerhead and Kinroad go karts Made from the same material as bullet proof vests, this belt will eliminate slip as well as increase durability. These belts were designed for racing use and will last longer than regular material belts. As your stock belt wears down, it gets thinner and thinner. This, in turn, will start to decrease your top speed. A kevlar belt will keep this from happening. At Scooter Dynasty we carry both superior quality fiber belts and kevlar / nylon belts by Polini, Bando, Athena, Sparta, and Malossi.