
EK/PBR 520M3 13/49 Chain Kit - Ultra-Light Sprocket by EK CHAIN: a kit designed for motocross riders seeking lightweight and durability for the final drive. Built for the terrain, it combines a robust 520 chain with a 13-tooth sprocket and an ultra-light 49-tooth aluminum sprocket, reducing unsprung weight without sacrificing wear resistance.
This kit is aimed at motocross and competition practitioners who want a final drive ready to tackle the track: starts, jumps, and hard accelerations. Easy to install and maintain, it is suitable for riders equipping YAMAHA YZ 450 F (2023 and 2021 CJ23) and YZ 450 FX (2020). Manufacturer reference: not provided.