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 drivetrain with the Vortex Racing V4 43-Tooth 520 Rear Sprocket, part number vtx316ZKV4-43. 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 performance-focused 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 previous CAT5 sprocket design


• Black finish provides a clean, performance-oriented appearance


• Manufactured in the USA

The Vortex Racing V4 sprocket is engineered for riders seeking responsive drivetrain performance without unnecessary rotating weight. Its precision manufacturing helps maintain consistent chain engagement and smooth power delivery, while the 43-tooth configuration is designed for compatible 520 chain applications. The lightweight aluminum construction supports quick acceleration and agile handling while maintaining the strength needed for demanding street and track environments.
This Vortex Racing rear sprocket fits select KTM motorcycles, including the 2024 KTM 990 Duke, 2024 KTM 890 Duke SMT, 2026 KTM 990 Duke, and 2026 KTM 990 Duke R. Confirm your motorcycle’s year, model, chain size, and gearing requirements before installation. Professional installation is recommended to ensure proper alignment, torque, and drivetrain adjustment.

Features:

• Brand: Vortex Racing

• Part Number: vtx316ZKV4-43

• Tooth Count: 43 teeth

• Chain Size: 520

• Material: Precision-machined 7075-T6 aluminum

• Finish: Black

• Weight Reduction: 10-15% lighter than CAT5

• Manufacturing: Made in the USA

• Fitment: 2024 KTM 990 Duke, 2024 KTM 890 Duke SMT, 2026 KTM 990 Duke, and 2026 KTM 990 Duke R

Fitment:
KTM 890 Duke SMT Base 2024
KTM 990 Duke Base 2024
KTM 990 Duke Base 2026
KTM 990 Duke R Base 2026