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 motorcycle’s drivetrain with the Vortex Racing V4 45-tooth 525 rear sprocket, part number vtx435CZKV4-45. Designed as the next generation of Vortex aluminum rear sprockets, the V4 platform builds on the proven CAT5 design with a lighter, more aggressive profile. Reduced rotating mass can help 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


• 10–15% lighter than the Vortex CAT5 sprocket platform


• Black finish for a clean, performance-oriented appearance


• Manufactured in the USA

This Vortex Racing V4 rear sprocket is engineered for riders seeking responsive drivetrain performance without unnecessary rotating weight. Its precision-machined construction helps maintain consistent chain engagement and dependable operation, while the 45-tooth configuration provides a performance-focused gearing option for compatible 525 chain applications. Verify chain size, tooth count, mounting pattern, and motorcycle fitment before installation. The sprocket fits select Yamaha models, including the 2004–2008 YZF-R1, 2006–2007 YZF-R6, 2006–2007 YZF-R6S, and 2006 YZF-R1 LE.

Features:

• 45-tooth rear sprocket for compatible 525 chain applications

• Precision-machined 7075-T6 aluminum construction

• 10–15% lighter than the Vortex CAT5 design

• Excellent concentricity for smooth, quiet operation

• Reduced rotating mass for improved acceleration and handling response

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

• Black finish

• Manufactured in the USA

Fitment:
Suzuki GSX-R1000 Base 2010
Suzuki GSX-R1000 Base 2011
Suzuki GSX-R1000 Base 2012
Suzuki GSX-R1000 Base 2013
Suzuki GSX-R1000 Base 2017
Suzuki GSX-R1000 Base 2018
Suzuki GSX-R1000 Base 2020
Suzuki GSX-R1000 Base 2021
Suzuki GSX-R1000 1 Million C.E. Base 2013
Suzuki GSX-R1000 ABS Base 2017
Suzuki GSX-R1000 ABS Base 2018
Suzuki GSX-R1000R Base 2017
Suzuki GSX-R1000R Base 2018
Suzuki GSX-R1000R Base 2019
Suzuki GSX-R1000R Base 2020
Suzuki GSX-R1000R Base 2021
Suzuki GSX-R1000R Base 2022
Suzuki GSX-R1000R Base 2023
Suzuki GSX-R1000R Base 2024
Suzuki GSX-R1000R Base 2025
Suzuki GSX-R1000R 100th Anniversary Edition Base 2021
Suzuki GSX-R1000RZ Base 2022
Suzuki GSX-R1000RZ Base 2023
Suzuki GSX-R1000RZ Base 2024
Suzuki GSX-R1000RZ Base 2025
Suzuki GSX-R1000X Base 2019
Suzuki GSX-R750 Base 2011
Suzuki GSX-R750 Base 2012
Suzuki GSX-R750 Base 2013
Suzuki GSX-R750 Base 2014
Suzuki GSX-R750 Base 2015
Suzuki GSX-R750 Base 2016
Suzuki GSX-R750 Base 2017
Suzuki GSX-R750 50th Ann. Edition Base 2014
Yamaha FJ-09 Base 2016
Yamaha FJ-09 Base 2017
Yamaha FZ-09 Base 2014
Yamaha FZ-09 Base 2015
Yamaha FZ-09 Base 2016
Yamaha FZ-09 Base 2017
Yamaha MT-09 Base 2018
Yamaha MT-09 Base 2019
Yamaha MT-09 Base 2020
Yamaha Tracer 900 Base 2019
Yamaha Tracer 900 GT Base 2019
Yamaha Tracer 900 GT Base 2020
Yamaha XSR900 Base 2016
Yamaha XSR900 Base 2017
Yamaha XSR900 Base 2018
Yamaha XSR900 Base 2019
Yamaha XSR900 Base 2020
Yamaha XSR900 Base 2021
Yamaha YZF-R1 Base 2004
Yamaha YZF-R1 Base 2005
Yamaha YZF-R1 Base 2006
Yamaha YZF-R1 Base 2007
Yamaha YZF-R1 Base 2008
Yamaha YZF-R1 Base 2026
Yamaha YZF-R1 LE Base 2006
Yamaha YZF-R1M Base 2026
Yamaha YZF-R6 Base 2006
Yamaha YZF-R6 Base 2007
Yamaha YZF-R6 Base 2008
Yamaha YZF-R6 Base 2009
Yamaha YZF-R6 Base 2010
Yamaha YZF-R6 Base 2011
Yamaha YZF-R6 Base 2012
Yamaha YZF-R6 Base 2013
Yamaha YZF-R6 Base 2014
Yamaha YZF-R6 Base 2015
Yamaha YZF-R6 Base 2016
Yamaha YZF-R6 Base 2017
Yamaha YZF-R6 Base 2018
Yamaha YZF-R6 Base 2019
Yamaha YZF-R6 Base 2020
Yamaha YZF-R6S Base 2006
Yamaha YZF-R6S Base 2007
Yamaha YZF-R6S Base 2008
Yamaha YZF-R6S Base 2009