Vortex 817ZK-47 Steel Rear Sprocket Pitch Sprockets - 520 47-Tooth Black

The Vortex 817ZK-47 is a 47-tooth steel rear sprocket designed as a direct-fit replacement or performance upgrade for compatible motorcycles. Featuring a 520 pitch chain and a durable black zinc finish, this sprocket delivers reliable power transfer and long service life under demanding street and track conditions.

Manufactured by Vortex Racing — a trusted name in motorcycle drivetrain components — this sprocket is precision CNC-machined from high-grade steel for consistent tooth geometry and tight tolerances. The black zinc coating provides corrosion resistance while maintaining a clean, stealthy appearance.

Key Features:

• 47 teeth — maintains or modifies final drive ratio to suit riding style or application
• 520 pitch chain compatibility for lightweight drivetrain setups
• CNC-machined steel construction for strength and longevity
• Black zinc finish for corrosion resistance and aesthetics
• Precision tooth profiling for smooth, quiet chain engagement
• Direct OEM-style fitment for easy installation

Whether you are restoring original gearing or fine-tuning acceleration and top speed, the Vortex 817ZK-47 sprocket is a proven, race-proven upgrade trusted by riders worldwide.