EK 420SR 420 Transmission Chain (manufacturer reference: 420SR-STL 130 SPJ) by EK CHAIN — a robust chain designed for urban, quad, motocross, and roadster use. The SR series benefits from a specific heat treatment of the plates to maintain flexibility and improve longevity without compromising the smoothness of the transmission.
- Pitch: 420
- Number of links: 130
- Color: Steel / Steel
- Weight: 0.75 kg / 100 links
- Relative lifespan: 200 (reference for 100 links)
Designed for transmissions requiring a compact and reliable chain, the EK 420SR fits small sprockets and crowns of 50cc motorcycles as well as off-road applications. Its construction emphasizes the durability of the plates and the continuity of flexibility, which limits stiffness phenomena after sustained mileage.
Compatibility and usage examples: ideal for lightweight machines and small displacements listed below, as well as for quads and training motorcycles.
- RIEJU MRT 50 SM (2025 - 50 cc)
- FANTIC XM 50 PERFORMANCE (2025 - 50 cc)
- BETA RR 50 MOTARD (2025 - 50 cc)
