Vortex Racing V4 43 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 43-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 for street riding, track use, and other performance applications. The black finish adds a clean, race-inspired appearance while supporting reliable use in demanding riding conditions.

• Excellent concentricity helps provide smooth, quiet operation and efficient power transfer


• Precision-machined from high-strength 7075-T6 aluminum for a strong, lightweight design


• 10-15% lighter than the Vortex CAT5 sprocket to reduce rotating mass


• 43-tooth configuration designed for 520 chain applications


• Manufactured in the USA to Vortex Racing quality standards

The Vortex Racing V4 sprocket is precision manufactured to support consistent chain engagement and dependable power delivery. Its high-strength aluminum construction provides an effective balance of durability and weight savings, making it a practical choice for riders seeking sharper response without sacrificing smooth operation. The 43-tooth gearing can also be used when adjusting final-drive characteristics to suit specific riding preferences or performance needs.
Part Number vtx642AZKV4-43 identifies this Vortex Racing black V4 rear sprocket. Confirm chain size, fitment, and gearing requirements for your motorcycle before installation. Professional installation is recommended, and the chain, front sprocket, and rear sprocket should be inspected together to ensure proper compatibility and alignment.

Features:

• 43-tooth rear sprocket for 520 chain applications

• Precision-machined from high-strength 7075-T6 aluminum

• 10-15% lighter than the Vortex CAT5 sprocket

• Excellent concentricity for smooth, quiet operation

• Supports efficient power transfer and reduced rotating mass

• Aggressive V4 design for street, track, and performance use

• Black finish

• Manufactured in the USA