
The EK/PBR 520SRX2 13/49 chain kit brings together the essentials to renew the transmission of a motocross machine: a gold-finished 520 chain, a 13-tooth sprocket, and a 49-tooth ultra-light aluminum rear sprocket. From the SRX series, this reference aims to balance performance, weight, and cost — a frequent choice for off-road riders demanding reliability and ease of maintenance.
Designed for the motocross world and compatible with lightweight enduros, this kit fits well on machines like the BETA RR 300 2T (2018–2019). The aluminum rear sprocket lightens the overall setup, and the gold finish facilitates visual inspection; the SRX2 chain offers a simple and robust replacement solution to get back on the track or for training. Ideal for riders seeking a compromise between weight and durability without complex modifications.