AFAM offers the standard 420R1 12/51 chain kit, which includes the chain, sprocket, and chainring to ensure smooth and perfectly matched power transmission between all drive components. This kit is designed for small-displacement motorcycles, where simplicity, reliability, and consistent power delivery are prioritized. It allows all wear components to be replaced in a single service, ensuring optimal performance and minimizing performance losses caused by partially worn parts. The main advantage of this kit lies in the harmonization of its components, reducing vibrations and improving the smoothness of the drivetrain. Its standard design strikes a good balance between durability and maintenance costs, while remaining suitable for daily or recreational use. Easy to install, it offers an effective solution for refurbishing the secondary transmission without technical complications.