Vortex Racing V4 45 Tooth 525 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 Yamaha motorcycle with the Vortex Racing V4 45-tooth 525 rear sprocket, part number vtx642CZKV4-45. Developed as the next generation of the proven Vortex CAT5 platform, the V4 features a lighter, more aggressive profile designed to reduce rotating mass. This reduction can improve acceleration, throttle response, handling, and overall agility for street riding, track use, and other performance applications. The black finish adds a clean, performance-focused appearance to your drivetrain.

• Excellent concentricity supports 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 platform


• 45-tooth configuration with 525 chain compatibility


• Manufactured in the USA

Designed for reliable performance and responsive power delivery, the Vortex Racing V4 rear sprocket is a practical choice for riders seeking optimized drivetrain performance without unnecessary weight. Its precision construction helps promote consistent chain engagement, while the durable aluminum design is suited to the demands of both spirited street riding and competition-oriented use. Verify chain size, gearing requirements, and motorcycle fitment before installation.
This Vortex Racing rear sprocket fits select Yamaha models, including the 2021-2024 MT-09, 2021-2024 MT-09 SP, and 2022-2024 XSR900. The 45-tooth gearing can be used to tailor final-drive characteristics to your riding preferences, with exact results depending on the motorcycle, front sprocket, chain, and setup. Professional installation is recommended to help ensure correct alignment, torque, and chain adjustment.

Features:

• Brand: Vortex Racing

• Part Number: vtx642CZKV4-45

• Sprocket Series: V4

• Tooth Count: 45 teeth

• Chain Compatibility: 525 chain

• Material: Precision-machined 7075-T6 aluminum

• Weight Reduction: 10-15% lighter than CAT5

• Operation: Excellent concentricity for smooth, quiet operation and efficient power transfer

• Manufacturing Origin: Made in the USA

• Finish: Black

• Fitment: 2021-2024 Yamaha MT-09, 2021-2024 Yamaha MT-09 SP, and 2022-2024 Yamaha XSR900

Fitment:
Yamaha MT-09 Base 2018
Yamaha MT-09 Base 2021
Yamaha MT-09 Base 2022
Yamaha MT-09 Base 2023
Yamaha MT-09 Base 2024
Yamaha MT-09 Base 2025
Yamaha MT-09 Base 2026
Yamaha MT-09 SP Base 2021
Yamaha MT-09 SP Base 2022
Yamaha MT-09 SP Base 2023
Yamaha MT-09 SP Base 2024
Yamaha MT-09 SP Base 2025
Yamaha MT-09 SP Base 2026
Yamaha XSR900 Base 2016
Yamaha XSR900 Base 2017
Yamaha XSR900 Base 2018
Yamaha XSR900 Base 2022
Yamaha XSR900 Base 2023
Yamaha XSR900 Base 2024
Yamaha XSR900 Base 2025
Yamaha XSR900 Base 2026