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 drivetrain with the Vortex Racing V4 44-tooth 520 rear sprocket, part number vtx144AZKV4-44. Designed as the next generation of Vortex aluminum rear sprockets, the V4 builds on the proven CAT5 platform with a lighter, more aggressive profile. Reduced rotating mass helps improve acceleration, throttle response, handling, and overall agility 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 durability and performance


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


• Black finish provides a clean, performance-focused appearance


• Manufactured in the USA

The Vortex Racing V4 rear sprocket is engineered for riders seeking responsive drivetrain performance without unnecessary rotating weight. Its precision manufacturing helps promote consistent chain engagement and dependable operation, while the high-strength aluminum construction provides an excellent balance of low weight and strength. The 44-tooth configuration is designed for compatible 520 chain applications and should be selected according to your motorcycle’s gearing requirements.
This Vortex Racing rear sprocket fits select Aprilia motorcycles, including the 2007 Aprilia Pegaso 650 Trail, 2008 and 2009 Aprilia SL 750 Shiver, 2025 Aprilia RS 457, and 2025 Aprilia Tuono 457. Verify the motorcycle model, year, chain size, tooth count, and final-drive specifications before installation. Professional installation is recommended to ensure correct alignment, chain tension, and torque of all related drivetrain components.

Features:

• 44-tooth rear sprocket for compatible 520 chain applications

• Lightweight V4 design reduces rotating mass

• 10-15% lighter than the Vortex CAT5 design

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

• Excellent concentricity for smooth, quiet operation

• Efficient power transfer for street, track, and performance riding

• Black finish

• Manufactured in the USA

Fitment:
Aprilia Pegaso 650 Trail Base 2007
Aprilia RS 457 Base 2025
Aprilia SL 750 Shiver Base 2008
Aprilia SL 750 Shiver Base 2009
Aprilia Tuono 457 Base 2025