Vortex 523ZR-42 Steel Rear Sprocket Series Sprockets - 42-Tooth 520

The Vortex 523ZR-42 is a 42-tooth steel rear sprocket designed for use with 520 series drive chains. Engineered for durability and precise power transfer, this sprocket is a reliable OEM-replacement or performance upgrade option for compatible motorcycles and powersports applications.

Key Features:

• 42-Tooth Configuration – Provides a balance of acceleration and top-end performance suited to street and track riding
• 520 Series Chain Compatibility – Designed for use with standard 520 pitch chains
• Steel Construction – Offers superior strength and longevity compared to aluminum alternatives, ideal for high-mileage and demanding riding conditions
• Precision Machined – Manufactured to tight tolerances for smooth chain engagement and reduced wear
• Direct Bolt-On Fitment – Designed as a drop-in replacement for OEM sprockets on compatible applications

The Vortex 523ZR-42 is part of Vortex Racing's trusted line of drivetrain components, combining race-proven engineering with everyday reliability. A steel rear sprocket is an excellent choice for riders prioritizing longevity and consistent performance over weight savings.