Vortex 840AZRV4-42 VTX Aluminum Rear Sprocket 42-Tooth

The Vortex 840AZRV4-42 is a high-performance aluminum rear sprocket designed as a direct replacement or performance upgrade for compatible motorcycles. Vortex is a well-respected name in the powersports industry, known for precision-machined drivetrain components trusted by racers and street riders alike.

This sprocket is manufactured from lightweight, high-strength aluminum and features a 42-tooth count, allowing riders to fine-tune their final drive ratio for optimal acceleration or top-speed performance. The hard-anodized finish provides excellent resistance to wear, corrosion, and the demanding conditions of both track and street use.

Key Features:

• 42-tooth rear sprocket for precise gearing customization
• Constructed from lightweight aluminum to reduce unsprung weight
• Hard-anodized finish for superior durability and corrosion resistance
• CNC-machined for tight tolerances and precise chain engagement
• Part of the VTX series — engineered for consistent, reliable performance
• Direct bolt-on fitment for compatible applications

Upgrading to a Vortex VTX aluminum rear sprocket is one of the most effective ways to reduce rotating mass and improve throttle response. The 840AZRV4 carrier pattern ensures a secure, properly aligned fit for supported models.