AFAM offers this 520XRR3 chain kit in a 13-50 configuration designed for the BETA RR 400cc. It combines a reinforced X-Ring chain, a steel sprocket, and an Ultra-Light aluminum mud-resistant chainring to optimize the balance between durability and performance gains. X-Ring technology effectively retains internal lubrication, reducing friction and limiting wear even during intensive use on abrasive terrain. The lightweight sprocket reduces rotating mass, thereby improving the bike’s responsiveness and acceleration precision. Its mud-resistant design facilitates the removal of debris to maintain a cleaner, smoother drivetrain under challenging conditions. The system offers a reliable, high-performance solution for riders seeking consistency, endurance, and efficiency on all types of terrain.