EK CHAIN 420SRO O-Ring 420 Universal ChainRef : EKC00462A / 1129887022

EK 420SRO O-Ring Transmission Chain 420 — Ref. 420SRO-STL 126 SKJ

The EK 420SRO is an O-ring chain designed to replace the original transmission on small displacement and lightweight off-road machines. Designed by EK CHAIN, it combines a lightweight profile (reduced perforation) and heat-treated steel alloys to provide a robust chain suitable for urban, motocross, and roadster use.

• Type: O-Ring — better retention of internal lubrication.
• Pitch: 420
• Number of links: 126
• Color: Steel / Steel
• Weight: 0.78 kg / 100 links (approximately 0.98 kg for 126 links)
• Relative lifespan: 1000 (reference value for 100 links)

Ideal for compact motorcycles and small motocross bikes where weight and longevity matter, this chain fits compatible 420 sprockets and crowns. Its O-ring limits dirt entry and retains lubrication, simplifying maintenance between service intervals. Remember to adjust the length (cut/add links if necessary) and check tension and alignment during installation.

Useful reference for models such as HONDA CRF 110 F (JE02), YAMAHA YZ 85 LW (CB10), and GAS GAS MC 65 — check compatibility with your machine before purchase.