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 the drivetrain performance of your 2006 Yamaha YZF-R1 LE with the Vortex Racing V4 45-tooth 525 rear sprocket. Building on the proven CAT5 platform, the V4 features a lighter, more aggressive design that reduces rotating mass for improved acceleration, sharper throttle response, enhanced handling, and greater overall agility. Its black finish provides a clean, performance-focused appearance suitable for street riding, track use, and other high-performance applications.

• Application: Fits 2006 Yamaha YZF-R1 LE


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


• Performance: Reduced rotating mass supports quicker acceleration and responsive handling


• Design: Approximately 10–15% lighter than the Vortex CAT5 rear sprocket platform


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


• Manufacturing: Made in the USA

The Vortex Racing V4 rear sprocket is engineered for riders who want dependable power delivery without adding unnecessary weight to the drivetrain. Precision manufacturing helps maintain consistent chain engagement and smooth operation, while the durable 7075-T6 aluminum construction provides a strong, lightweight solution for demanding riding conditions. The 45-tooth configuration is designed for compatibility with 525 chain applications and should be matched with the motorcycle’s complete gearing setup for the intended riding environment.
Designed and manufactured by Vortex Racing, part number vtx840CZKV4-45, this rear sprocket is a practical performance upgrade for the Yamaha YZF-R1 LE. Confirm chain size, tooth count, and motorcycle fitment before installation. Professional installation is recommended to ensure correct sprocket alignment, chain adjustment, and fastener torque.

Features:

• Application: Fits 2006 Yamaha YZF-R1 LE

• Tooth Count: 45-tooth rear sprocket

• Chain Size: Designed for 525 chain applications

• Material: Precision-machined high-strength 7075-T6 aluminum

• Weight Reduction: Approximately 10–15% lighter than the Vortex CAT5 platform

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

• Concentricity: Supports smooth, quiet operation and efficient power transfer

• Manufacturing: Made in the USA

• Finish: Black

Fitment:
Yamaha YZF-R1 LE Base 2006