Vortex 317ZKV4-40 VTX Aluminum Rear Sprocket Chain Sprockets - 40-Tooth 520

The Vortex 317ZKV4-40 is a 40-tooth aluminum rear sprocket designed for the 520 chain pitch. Part of Vortex's VTX lineup, this sprocket is precision-engineered for sport and performance motorcycle applications demanding reduced weight and reliable drivetrain performance.

Key Features:

• 7075-T6 billet aluminum construction — premium aerospace-grade alloy machined to Vortex's exacting specifications for maximum strength-to-weight ratio
• 100% CNC manufactured in the USA — tight tolerances ensure consistent fit and smooth chain engagement
• Silver anodized finish — electrically coated for corrosion resistance and a bright, lasting appearance
• 40-tooth rear sprocket — designed for 520 chain pitch applications
• Unique tooth profile — Vortex's proprietary tooth geometry promotes longer sprocket and chain life
• Lightweight design — reduces rotating mass for improved throttle response, acceleration, and deceleration
• ZKV4 bolt pattern — engineered to match specific OEM hub configurations for direct-fit installation

Vortex Racing is a benchmark brand in motorcycle drivetrain components, trusted by racers and street riders alike. The 317ZKV4-40 rear sprocket delivers a performance upgrade over standard steel sprockets with significant weight savings, making it an ideal choice for track days, sport riding, and performance-oriented builds.