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The EK CHAIN 420SR 11/58-136 chain kit is designed for urban riders seeking a reliable and easy-to-maintain transmission for their 50cc motorcycle. Built around the SR range, it maintains good flexibility even after prolonged use thanks to a specific heat treatment applied to the plates, aimed at enhancing the durability and strength of the components.
This seal-less kit (non O-ring) offers a classic installation: direct lubrication of the links and regular maintenance to keep the transmission smooth and responsive in urban environments. The aluminum crown lightens the overall setup without compromising the strength needed for daily rides. Suitable for the wheels and gear ratios intended for the small displacements mentioned.
Main compatibilities:
Manufacturer reference: Not provided.
