



EK/PBR 420SR 12/44-122 Chain Kit - Standard Sprocket
Designed for small sport bikes and urban utility vehicles, this EK SR chain kit combines a 420 chain and a standard steel sprocket (12/44) for a reliable and straightforward transmission. The SR series features a specific heat treatment of the plates: the chain maintains its flexibility even after long hours of riding, while the strength of the links is enhanced.
Open chain (non-sealed): regular maintenance and lubrication are recommended to preserve flexibility and longevity. The kit comes with a length of 122 links — adjustment (shortening) may be necessary depending on the installation and swingarm.
Ideal for urban use and for the listed 50cc machines: