The RK 520 MXU is a lightweight sealed-ring racing chain engineered for consistent power delivery and dependable service in demanding race applications. Designed for motorcycles and powersports vehicles from 125cc to 500cc, this 120-link chain provides a practical balance of low rotating mass, tensile strength, and extended chain life. Its 520-size configuration is suited to compatible performance drivetrains that require a high-quality racing chain.
Manufactured by RK and identified by manufacturer part number GB520MXU-120, this sealed UW-ring chain is built to help retain lubrication and limit the intrusion of dirt and debris into the chain’s internal wear areas. The result is smoother operation and more consistent performance throughout use. The lightweight construction weighs approximately 3 pounds per 100 links, helping reduce drivetrain load while maintaining the strength required for competitive riding.
The RK 520 MXU includes a clip-style connecting link for installation on compatible applications. Always verify the motorcycle manufacturer’s chain size, required link count, clearance, and connecting-link specification before installation. Proper alignment, lubrication, and adjustment are recommended to support chain life and reliable power transmission. This RK racing chain is supplied in a 120-link length and is intended for race-oriented applications where weight reduction and consistent performance are important.
Features:
- Size: 520 sealed-ring racing chain
- Model: 520 MXU
- Brand: RK
- Manufacturer: RK
- Vendor part number: GB520MXU-120
- Length: 120 links
- Application: Designed for race motorcycles and powersports vehicles from 125cc to 500cc
- Construction: Lightweight sealed UW-ring design for consistent power delivery and extended chain life
- Weight: Approximately 3 pounds per 100 links
- Included: Clip-style connecting link