
EK/PBR 420SR Chain Kit 13/51 - Ultra-light Sprocket
Designed for urban riders and small displacement bikes, this EK SR chain kit combines lightness and durability. The ultra-light aluminum sprocket reduces unsprung mass without compromising dimensional stability, while the SR series features a heat treatment of the plates that maintains the flexibility of the chain even after extensive mileage. The result: a smooth transmission and responsive behavior during acceleration in the city or on light trails.
Easy to install on the relevant 50cc models, this kit is aimed at riders looking for a balance between reduced weight and everyday robustness. Ideal for replacing a worn-out set and regaining the feeling of a new chain, it is particularly suitable for the machines listed in compatibility.
For optimal longevity, regularly check the tension and lubrication of the chain after installation. Installation and adjustments are recommended according to your motorcycle's manufacturer manual.