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Designed for small displacement and lightweight off-road machines, the EK 420SR chain offers reliability and modularity in the final drive. The SR series combines a construction aimed at maintaining flexibility after long hours on the road or track. The plates benefit from a specific heat treatment that increases wear resistance without compromising the link play.
Pitch: 420
Number of links: 118 (delivered ready to be adjusted according to installation)
Color: Steel / Steel
Weight: 0.75 kg / 100 links (manufacturer data)
Relative lifespan index: 200 (manufacturer value)
Versatile, it caters to urban, quad, motocross, and roadster environments — ideal for 50cc and small single-cylinder bikes (e.g., RIEJU MRT 50 SM, FANTIC XM 50, BETA RR 50 MOTARD) depending on the sprocket/crown configuration. To get the best performance from this chain: regularly check the tension, lubricate at recommended intervals, and inspect the condition of the sprocket and crown.
Raw steel chain, simple and robust installation for those seeking a durable and high-performing final drive without frills — a rational choice for the maintenance and refurbishment of lightweight transmissions.
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