EK/PBR 520SRX2 13/49 Chain Kit - ultra-light sprocket by EK CHAIN, designed for off-road riders who want a complete, robust, and lightweight kit. This setup combines a 13-tooth sprocket, a 49-tooth ultra-light aluminum rear sprocket, and a 520 pitch chain — ready to be adjusted to fit your machine.
- Brand: EK CHAIN
- Kit composition: 13-tooth sprocket, 49-tooth (ultra-light aluminum) rear sprocket, 112-link chain
- Pitch: 520
- Color: gold / gold (chain and seals)
- Weight: 1.54 kg for 100 links (manufacturer's data)
- Relative lifespan: 3300 (manufacturer reference for 100 links)
The SRX series of this kit offers a good compromise between cost and reliability, widely used in motocross for its versatility. The aluminum rear sprocket reduces unsprung mass, while the gold chain provides a polished look that visually complements an off-road motorcycle. Kit supplied with 112 links — length can be adjusted during installation.
Particularly suitable for models like the YAMAHA WR 125 Z (2002–2003) and other small displacement motocross bikes equipped with a 520 pitch. Before installation, check the number of links required and adjust the tension according to the manufacturer's recommendations.
