Renthal Rear Aluminum Sprocket, 47-Tooth, Blue (121U-428-47GPBU)

Upgrade your motorcycle’s drivetrain with the RENThAL 121U-428-47GPBU rear sprocket, engineered for riders who want reduced unsprung weight, efficient power transfer, and dependable durability. This blue aluminum sprocket is designed for compatible Suzuki and Yamaha applications and provides a performance-focused replacement for heavier steel sprockets.
CNC-machined construction delivers precise tooth geometry and a computer-aided ultra-light design that helps reduce unsprung weight while improving power transfer. The sprocket is manufactured from high-strength, specially enhanced 7075-T6 aluminum, offering a substantial weight reduction compared with steel without sacrificing the strength needed for demanding riding conditions.
A specialized tooth profile allows the chain to roll smoothly on and off the sprocket. This design helps promote longer chain and sprocket wear, reduced drivetrain noise, and more efficient power delivery. The 47-tooth configuration provides a reliable fit and performance option for compatible Suzuki and Yamaha motorcycles using a 428 chain.
Designed for riders, technicians, and performance-focused builders, the RENThAL 121U-428-47GPBU combines lightweight construction, durable materials, and carefully engineered tooth engagement. Verify your motorcycle’s year, model, chain size, and original sprocket specifications before installation to ensure compatibility.

Features:

• CNC-machined construction: Provides precise manufacturing and consistent tooth geometry compared with stamped sprockets

• Ultra-light design: Helps reduce unsprung weight and improve power transfer

• 7075-T6 aluminum construction: Uses high-strength, specially enhanced aluminum for a lightweight and durable drivetrain component

• Weight reduction: Aluminum construction is approximately 33% lighter than steel

• Special tooth profile: Helps the chain roll smoothly on and off the sprocket for longer wear and reduced noise

• 47-tooth configuration: Supports reliable drivetrain performance for compatible Suzuki and Yamaha applications

• 428 chain compatibility: Designed for motorcycles using a compatible 428 chain and drivetrain setup

• Blue finish: Adds a distinctive appearance to the motorcycle’s rear drivetrain

Ships from Parts Unlimited.