
EK/PBR 420SR Chain Kit 13/47 - Standard Sprocket
Designed for the final drive of small urban motorcycles, this EK CHAIN 420SR chain kit combines a 13-tooth sprocket and a 47-tooth standard sprocket configuration. The SR series features a specific heat treatment of the plates to maintain flexibility and longevity, while enhancing wear resistance — a useful compromise for daily city use.
Ideal for regular maintenance and restoration of moped and small sports bike transmissions, this kit is aimed at riders looking for a robust and easy-to-install solution. Compatibility examples: RIEJU RS2 50 MATRIX PRO (2003) and RIEJU RS1 50 (2003).