
EK/PBR 420SR 11/47 Chain Kit - Standard Sprocket by EK CHAIN: a complete transmission set designed for small displacement bikes and urban use. The SR series combines heat-treated plates to maintain flexibility and longevity even after regular use — a significant advantage for frequent starts and stop-and-go trips in the city.
This kit is particularly suitable for 50 cc motorcycles and urban uses where reliability and ease of maintenance are paramount. Ideal for models listed such as RIEJU RS3 50 (2020), RIEJU RS3 50 NKD (2018), or RIEJU RS2 50 RACING (2010). To maintain its performance, ensure proper tension adjustment and regular lubrication.
Simple installation and standard parts: sprocket, chain, and sprocket provided for a complete replacement of the secondary transmission for a quick return to the road or city.