Renthal Rear Sprocket for Yamaha, 49-Tooth (131U-520-49GBSI)

Upgrade your Yamaha drivetrain with the Renthal 131U-520-49GBSI rear sprocket, engineered for riders who demand responsive power transfer, reduced rotating weight, and dependable durability. This 49-tooth sprocket is CNC-machined rather than stamped, allowing Renthal to produce a precise, computer-aided ultra-light design that helps reduce unsprung weight and improve acceleration and handling response.
The rear sprocket is manufactured from high-strength, specially enhanced 7075-T6 aluminum. Compared with a conventional steel sprocket, this advanced aluminum construction is 33% lighter, helping reduce drivetrain weight while maintaining the strength required for demanding riding conditions. The result is efficient power transfer without compromising performance or reliability.
The Renthal 131U-520-49GBSI also features a specialized tooth profile designed to help the chain roll smoothly onto and off the sprocket. This controlled chain engagement can support longer chain and sprocket wear, quieter operation, and more efficient power delivery. Its precision-machined construction and race-inspired design make it a practical performance upgrade for compatible Yamaha applications.
Feature: CNC-machined construction for precise production and consistent performance
Feature: Computer-aided ultra-light design helps reduce unsprung and rotating weight
Feature: Enhanced 7075-T6 aluminum provides a strong, lightweight alternative to steel
Feature: 49-tooth rear sprocket configuration for compatible Yamaha drivetrains
Feature: Special tooth profile promotes smooth chain engagement, reduced noise, and longer wear

Features:

• CNC-machined construction for precise production and consistent performance

• Computer-aided ultra-light design helps reduce unsprung and rotating weight

• Enhanced 7075-T6 aluminum provides a strong, lightweight alternative to steel

• 49-tooth rear sprocket configuration for compatible Yamaha drivetrains

• Special tooth profile promotes smooth chain engagement, reduced noise, and longer wear

Ships from Parts Unlimited.