EK Heavy-Duty Non-Sealed Roller Chain, 120 Links (520SR-120)

The EK 520SR-120 Heavy-Duty Non-Sealed Roller Chain is designed for dependable performance in demanding motorcycle and powersports applications. This economical SR-series chain combines durable construction with practical serviceability, making it a reliable replacement for worn or stretched drive chains. The chain includes 120 links and is supplied with a clip-type master link for convenient installation and maintenance.
Built from a special steel alloy, the EK 520SR-120 features solid rollers, solid bushings, and four-point riveting to support extended wear life under regular load and operating stress. The components are shot-peened to improve durability, while pre-stretching helps reduce initial adjustment and promotes consistent chain performance after installation. Its non-sealed design is suitable for applications where straightforward maintenance and efficient power transfer are priorities.
The EK 520SR-120 part number identifies this specific 520-series chain configuration, helping ensure compatibility when replacing an existing chain. For best results, verify the motorcycle or equipment manufacturer’s recommended chain size, link count, and master-link style before installation. Proper lubrication, alignment, tension adjustment, and routine inspection will help maximize the service life of this heavy-duty EK chain.

Features:

• Brand: EK

• Part Number: 520SR-120

• Chain Type: Heavy-duty non-sealed roller chain

• Series: 520 SR

• Link Count: 120 links

• Construction: Special steel alloy with solid rollers and solid bushings

• Riveting: Four-point riveting for increased wear resistance

• Surface Treatment: Shot-peened components for enhanced durability

• Preparation: Pre-stretched to help minimize initial adjustment

• Master Link: Clip-type master link included

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