Vortex 523ZK-47 Steel 47-Tooth 520-Pitch Rear Sprocket

The Vortex 523ZK-47 is a 520-pitch, 47-tooth steel rear sprocket designed as a direct-fit replacement or performance upgrade for a wide range of sport motorcycles. Finished in a silver zinc-plated coating, this sprocket delivers excellent corrosion resistance while maintaining a clean, classic look on the bike.

Key Features:

• 520 Pitch — compatible with standard 520-series chains for broad motorcycle fitment
• 47 Teeth — adds gear reduction for improved low-end torque and acceleration compared to smaller stock sprockets
• High-tensile carbon steel construction — precision CNC machined for tight tolerances and long service life
• Silver zinc-plated finish — provides corrosion resistance and a clean appearance
• Vortex patented tooth design — engineered for optimal chain engagement, smooth power transfer, and extended sprocket longevity
• Precision CNC machined individually to ensure concentricity and consistent fitment

Vortex Racing is a trusted name in motorcycle drivetrain components, supplying sprockets to professional racers and street riders alike. The 523ZK series steel rear sprockets are ideal for riders seeking a durable, performance-oriented alternative to OEM sprockets without the added cost of aluminum. Upgrading to a 47-tooth rear sprocket can sharpen throttle response and improve acceleration, making it a popular choice for both street performance and track use.