Renthal Yamaha 51-Tooth Rear Sprocket (131U-520-51GBSI)

Upgrade your Yamaha drivetrain with the Renthal 131U-520-51GBSI rear sprocket, engineered for efficient power transfer, reduced unsprung weight, and dependable performance. This 51-tooth sprocket is CNC-machined rather than stamped, providing precise manufacturing and a computer-aided ultra-light design that helps reduce rotating mass without compromising strength.
The Renthal rear sprocket is manufactured from high-strength, specially enhanced 7075-T6 aluminum. This premium aluminum construction is 33% lighter than steel, helping improve acceleration, handling, and overall drivetrain response. Its lightweight design makes it a practical choice for riders seeking improved performance while maintaining the durability required for demanding riding conditions.
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 drivetrain noise, and support more consistent power delivery. The carefully machined tooth shape also contributes to smooth operation throughout the transmission of engine power to the rear wheel.
Designed for compatible Yamaha applications, the Renthal 131U-520-51GBSI combines lightweight construction, high-strength aluminum, and precision CNC machining in a performance-focused rear sprocket. Verify fitment and chain compatibility before installation.

Features:

• Brand: Renthal

• Part Number: 131U-520-51GBSI

• Application: Yamaha-compatible rear sprocket

• Tooth Count: 51 teeth

• Construction: CNC-machined aluminum rather than stamped steel

• Material: High-strength, specially enhanced 7075-T6 aluminum

• Weight Advantage: 33% lighter than steel for reduced unsprung weight

• Tooth Profile: Promotes smooth chain engagement and release

• Performance Benefits: Supports longer wear, reduced noise, and efficient power transfer

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