Vortex 317ZUV4-42 VTX Aluminum Rear Sprocket 42-Tooth

The Vortex 317ZUV4-42 is a high-performance 42-tooth aluminum rear sprocket from Vortex Racing's VTX series. Engineered for powersports applications, this sprocket delivers a perfect balance of lightweight construction and durable performance for riders who demand precision-machined drivetrain components.

Vortex sprockets are CNC-machined from high-grade 7075-T6 aluminum alloy, providing exceptional strength while significantly reducing unsprung rotational mass compared to steel alternatives. The result is improved throttle response, sharper acceleration, and reduced drivetrain stress.

Key Features:

• 42-tooth rear sprocket for optimized gear ratio and acceleration tuning
• CNC-machined from 7075-T6 aluminum alloy for maximum strength-to-weight ratio
• Hard anodized finish for corrosion resistance and extended service life
• Precision laser-cut tooth profile for smooth, quiet chain engagement
• Direct OEM replacement fit — no modifications required
• Lightweight design reduces unsprung rotational mass for improved performance
• Manufactured to strict tolerances for consistent chain alignment

The Vortex VTX series rear sprocket is a proven upgrade for performance-minded riders looking to fine-tune their gearing without adding unnecessary weight. Easy bolt-on installation makes this a straightforward addition to any drivetrain service or gearing change.