
EK/PBR 420SR Chain Kit 11/59 – Standard Sprocket
This complete kit combines the EK 420SR chain (non O-ring) with a PBR steel front sprocket and a steel rear sprocket. Designed for urban use and light trail riding, it offers reliable transmission and good longevity for 50 cc motorcycles and machines up to ~25 HP.
Advantages: ready-to-install kit to restore transmission, machined teeth for precise coupling with the chain, steel components to withstand daily urban stresses. Ideal for refurbishment after wear or to maintain a strong acceleration and smooth transmission. Remember to check tension and lubricate regularly to maximize lifespan.
Compatible motorcycles (examples): DERBI Senda X-Treme 50 SM, GILERA SMT 50 Drifting, APRILIA SX 50 Factory.