EK CHAIN 420SRO O-Ring 420 Universal ChainRef : EKC00468A / 1129887028

Manufacturer Reference: 420SRO-STL 138 SKJ

The EK 420SRO O-Ring chain is a reliable solution for those seeking a robust and economical transmission for urban, roadster, or light off-road machines. Designed around O-Ring seals, it retains lubricant between the links to limit wear and facilitate maintenance. Its construction utilizes thermally treated steel alloys and precision machining, hallmarks of EK quality.

• Type: O-Ring
• Pitch: 420
• Number of Links: 138
• Color: Steel / Steel
• Relative Lifespan: index 1000 (based on 100 links)
• Weight: 0.78 kg for 100 links (approximately 1.08 kg for 138 links)
• Design: perforations for weight reduction and optimization of dynamic behavior

Ideal for small displacement engines and uses combining city and off-road, this 420SRO adapts to configurations requiring 138 links. Common fitment examples include: HONDA CRF 110 F, YAMAHA YZ 85 LW Big Wheels, GAS GAS MC 65. Be sure to check the sprocket, chainring, and spacing before installation and adhere to lubrication intervals to maximize longevity.