







EK/PBR 428SR Chain Kit 12/56 - Standard Sprocket
This EK CHAIN 428SR kit includes a sprocket, standard rear sprocket, and chain for a complete transmission overhaul. Designed for urban use, it features the characteristics of the SR series: plates subjected to a specific heat treatment to maintain chain flexibility while enhancing durability and wear resistance. Ideal for small displacement and compact machines requiring a 12/56 ratio.
Standard installation and adjustment: this kit allows for a complete replacement of the secondary transmission to achieve a well-tensioned chain and reliable transmission. Compatible with several 50 cc models referenced (e.g., Sherco SE 50), it is aimed at riders looking for a robust part suitable for daily urban use.