Renthal Rear Aluminum Sprocket, 51-Tooth Green (191U-420-51GEGN)

Upgrade your motorcycle’s final-drive performance with the Renthal 191U-420-51GEGN rear sprocket. CNC-machined rather than stamped, this sprocket uses a computer-aided ultra-light design to reduce unsprung weight and help improve power transfer. Its green finish adds a distinctive look while maintaining the precise fit and dependable performance expected from Renthal components.
The rear sprocket is manufactured from high-strength, specially enhanced 7075-T6 aluminum, offering a significant weight reduction compared with steel without sacrificing the strength required for demanding riding. The lighter construction helps reduce rotating and unsprung mass, supporting responsive acceleration, improved handling, and efficient power delivery.
A specially engineered tooth profile allows the chain to roll smoothly onto and off the sprocket. This design helps promote longer chain and sprocket wear, reduce operating noise, and transfer power more efficiently through the drivetrain. The 51-tooth configuration is designed for compatible Kawasaki applications and provides a practical gearing option for riders seeking reliable performance and precise chain engagement.
Choose the Renthal 191U-420-51GEGN when you need a lightweight, durable, and accurately machined rear sprocket for a compatible Kawasaki motorcycle. It combines premium 7075-T6 aluminum construction, optimized tooth geometry, and Renthal engineering to support consistent drivetrain performance in a range of riding conditions.

Features:

• CNC-machined construction: Provides precise manufacturing and a lightweight alternative to stamped sprockets.

• Ultra-light design: Reduces unsprung and rotating weight to help improve handling and power transfer.

• 7075-T6 aluminum construction: Delivers high strength with substantially less weight than steel.

• Specially engineered tooth profile: Helps the chain roll smoothly on and off the sprocket for reduced noise and extended wear.

• 51-tooth configuration: Provides a compatible gearing option for select Kawasaki motorcycles.

• Green finish: Adds a distinctive appearance while complementing performance-focused motorcycle builds.

Ships from Parts Unlimited.