The RK 520 Aluminum Race Chain and Sprocket Kit is designed for Yamaha YZF-R1/M motorcycles seeking responsive race gearing and reduced rotating mass. This complete kit includes RK’s premium XW-ring sealed racing chain with a gold finish, a lightweight Driven® 7075 T6511 aluminum rear sprocket with black hard anodizing, and Driven® C45 steel front sprockets that are case hardened and quenched for durability.
As part of the 520 Aluminum Race series, the RK kit includes a front sprocket that is one tooth smaller than the stock specification. This gearing configuration helps deliver quicker acceleration, faster engine response, and rapid progression to the motorcycle’s redline in each gear. The reduced weight of the aluminum rear sprocket supports improved performance without sacrificing normal ride quality or handling characteristics.
Built for compatible Yamaha YZF-R1/M applications, this kit combines race-focused gearing with dependable chain and sprocket construction. The sealed XW-ring chain helps retain lubrication and protect the chain’s internal components, while the Driven® sprockets provide a carefully matched combination of lightweight performance and wear resistance. Verify year-specific fitment and the original equipment gearing before installation. The manufacturer is RK, and the vendor part number is 4107-158DGX.
Features:
- Fitment: Designed for compatible Yamaha YZF-R1/M motorcycles; verify model year before installation
- Chain size: 520 racing chain configuration
- Chain construction: Premium RK XW-ring sealed chain with a gold finish
- Rear sprocket: Driven® 7075 T6511 lightweight aluminum with black hard anodized finish
- Front sprocket: Driven® C45 steel, case hardened and quenched for durability
- Gearing: Includes a front sprocket one tooth smaller than stock
- Performance: Helps reduce rotating mass and improve acceleration and engine response
- Handling: Designed to enhance race performance without sacrificing normal ride and handling characteristics
- Brand: RK
- Manufacturer part number: 4107-158DGX
- Vendor part number: 4107-158DGX