EK/JT 520H 13/51 Chain Kit - Ultra-Light Sprocket by EK CHAIN: a transmission kit designed for motocross, manufactured according to EK JAPAN standards and optimized to offer a good quality/price ratio and performance suited to off-road demands.
- Type: 520 chain kit (pitch 520) — ideal for motocross bikes requiring a reliable drive system.
- Composition: steel/steel chain, ultra-light aluminum sprocket to reduce unsprung mass.
- Number of links: 116 links (delivered ready to install with necessary adjustments).
- Relative lifespan: 150 (based on 100 links), longevity indicator provided by the manufacturer.
- Indicative weight: 1.66 kg for 100 links (weight provided for informational purposes).
- Provided ratio: 13-tooth sprocket / 51-tooth sprocket.
- Manufacturer reference: not provided.
This kit is aimed at motocross riders looking for a ready-to-use transmission with a lightweight aluminum sprocket to minimize inertia. Suitable for Yamaha YZ 125 models from 1990 to 1992 — please check the fitment and adjustments on your model before installation. Sold as a complete kit: chain + sprocket + rear sprocket.
