Vortex Racing V4 44 Tooth 520 Rear Sprocket - Black

The next generation of Vortex aluminum rear sprockets, V4 builds on the long-running CAT5 sprocket platform with a lighter, more aggressive design. Reduced rotating mass improves acceleration, throttle response, handling, and overallagility. Ideal for street, track, and performance applications.

• Excellent concentricity for smooth, quiet operation and efficient power transfer
• Precision-machined from high-strength 7075-T6 aluminum
• 10-15% Lighter than CAT5
• Manufactured in the USA

Upgrade your motorcycle’s final-drive performance with the Vortex Racing V4 44-Tooth 520 Rear Sprocket. Designed as the next generation of Vortex aluminum rear sprockets, the V4 builds on the proven CAT5 platform with a lighter, more aggressive profile. Its reduced rotating mass can help improve acceleration, throttle response, handling, and overall agility, making it a strong choice for street riding, track use, and other performance applications.

• Excellent concentricity supports smooth, quiet operation and efficient power transfer


• Precision-machined from high-strength 7075-T6 aluminum for a balance of strength and low weight


• 10–15% lighter than the Vortex CAT5 sprocket design


• Black finish provides a clean, performance-oriented appearance


• Manufactured in the USA

The Vortex Racing V4 sprocket is engineered for dependable fit and consistent drivetrain operation when matched with the correct motorcycle application and 520 chain system. Precision manufacturing helps maintain accurate tooth alignment and concentric rotation, supporting reliable power delivery throughout the operating range. The 44-tooth gearing configuration can also be used to tailor final-drive response according to the rider’s performance goals, motorcycle setup, and riding environment.
Built from 7075-T6 aluminum, this rear sprocket delivers a durable, lightweight solution for riders seeking sharper response without unnecessary rotating weight. The Vortex Racing part number vtx839AZKV4-44 identifies this specific black, 44-tooth V4 configuration. Verify motorcycle fitment, chain size, and gearing requirements before installation. Professional installation and proper chain tension adjustment are recommended for safe, reliable operation.

Features:

• Brand: Vortex Racing

• Part Number: vtx839AZKV4-44

• Series: V4

• Tooth Count: 44 teeth

• Chain Size: 520

• Material: Precision-machined 7075-T6 aluminum

• Finish: Black

• Weight Reduction: 10–15% lighter than CAT5

• Performance: Reduced rotating mass supports acceleration, throttle response, handling, and agility

• Manufacturing: Made in the USA