
This complete kit combines the EK 420SR chain with a PBR front sprocket (11 teeth) and a steel rear sprocket (51 teeth) for a quick and clean restoration of the transmission. Designed for urban use and light off-road riding, it features high-strength steel components suitable for small displacement bikes and mopeds.
Technical SpecificationsManufacturer Reference: Not provided. Common compatibilities: BETA RR 50 (Enduro Sport / Racing / 2017) and similar models in 50 cc — please check the pitch and number of links before ordering.