EK Chain 520SRO6118 520 x 118 Links SRO6 O-Ring Drive Chain

The EK Chain 520SRO6 in 118-link length is a Japanese-made O-ring sealed motorcycle drive chain designed to deliver reliable performance without compromising on quality. Built with high-tech heat-treated steel alloys and featuring integrated lightening holes, the SRO6 series delivers the same EK craftsmanship found across their full product line at a value-conscious price point.

O-ring seals between each link plate retain internal lubrication and block out dirt, water, and debris — extending service life and reducing maintenance intervals compared to standard non-sealed chains. Solid rollers and anti-kink bushings further contribute to smooth, consistent power transfer and long-term wear resistance.

Key Specifications:

• Chain Pitch: 520
• Number of Links: 118
• Seal Type: O-Ring
• Average Tensile Strength: 8,500 lbs
• Wear Life Index: 1,000
• Max Engine Displacement (Street/Off-Road): 650cc
• Master Link Included: Clip-type
• Country of Manufacture: Japan

The EK SRO6 is an ideal replacement drive chain for street motorcycles, dual-sport bikes, and ATVs operating at up to 650cc, offering a durable, long-lasting solution backed by EK's reputation for precision chain manufacturing.