The EK/PBR 420SR 13/51 chain kit with ultra-light sprocket is a set designed for small displacement bikes and urban use. Developed by EK CHAIN, this kit combines a 13-tooth front sprocket, a 51-tooth lightweight aluminum rear sprocket, and a 126-link 420 SR chain to provide a lively and reliable ride on your 50cc.
The SR series stands out for its design that maintains the chain's flexibility even after prolonged use. The plates undergo a specific heat treatment to enhance their durability and wear resistance, without compromising the flexibility needed for gear shifting and daily demands.
- Type: 420SR 13/51 chain kit (13-tooth sprocket / 51-tooth sprocket)
- Chain: steel/steel color, 126 links, pitch 420
- Sprocket: ultra-light aluminum (reduced weight)
- Weight: 0.75 kg for 100 links
- Durability: relative index 200 (for 100 links)
- Brand: EK CHAIN
- Manufacturer reference: Not provided
Ideal for riders of small urban enduros seeking a lightweight and robust chain-sprocket set. Compatible with:
- BETA RRT 50 ENDURO (2005)
- BETA RRT 50 ENDURO (2004)
- BETA RRT 50 ENDURO (2003)
A kit that is easy to install to achieve a responsive transmission while minimizing unsprung mass — perfect for the city, rides, and regular maintenance of your small trail bike.
