Vortex 635ZK-42 Steel Rear Sprocket 42T

The Vortex 635ZK-42 is a 42-tooth steel rear sprocket designed as a direct OEM-style replacement for compatible sportbikes and motorcycles. Manufactured by Vortex Racing, a trusted name in performance drivetrain components, this sprocket delivers reliable power transfer and long-lasting wear resistance for both street and track applications.

Key Features:

• 42 teeth — direct-fit replacement for stock gearing or mild gearing adjustment
• Constructed from high-strength steel for superior durability and extended service life
• Precision CNC machined for accurate tooth profile and consistent chain engagement
• Part of Vortex's 635ZK series, engineered to meet OEM fitment specifications
• Compatible with standard drive chain sizes for the intended application
• Corrosion-resistant finish to withstand road debris and environmental exposure

Vortex sprockets are a popular choice among riders seeking a quality replacement or upgrade over OEM parts, offering precise manufacturing tolerances and proven performance. The 635ZK-42 is a bolt-on solution that requires no modifications for properly fitted applications.