EK CHAIN 420SR 420 Universal ChainRef : EKC00724A / 1129896018

EK 420SR 420 Drive Chain — Manufacturer reference: 420SR-STL 118 SPJ

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.