
The EK/PBR 520MRD7 13/49 chain kit is a transmission set designed for motocross use: a reinforced 520 chain combined with a 13-tooth front sprocket and a 49-tooth rear sprocket (standard steel sprocket). Designed for intensive use on loose and rugged terrains, it offers dimensional stability suited to the demands of off-road riding without unverified technical claims.
This kit is aimed at motocross riders looking for a robust replacement solution compatible with the original setups of the listed 450 cross models. To ensure longevity and safety: regularly check the tension, lubricate the chain after each muddy ride, and replace it as soon as noticeable wear or excessive stretching occurs.
Common compatibilities: