Vortex 604ZB-31 Black Aluminum Rear Sprocket 31-Tooth

The Vortex 604ZB-31 is a 31-tooth black anodized aluminum rear sprocket designed for high-performance street and track motorcycle applications. Precision-engineered to exact tolerances, this sprocket delivers reliable power transfer and reduced rotating mass compared to heavier steel alternatives.

Key Features:

• 31-Tooth Configuration — Allows riders to fine-tune gear ratios for improved acceleration or top-end performance
• Black Anodized Finish — Corrosion-resistant black anodized aluminum construction for a clean, aggressive look
• Lightweight Aluminum Construction — Reduces rotating mass for improved throttle response and overall performance
• CNC Machined in the USA — Manufactured to precise tolerances for concentricity and consistent fit
• Patented Tooth Design — Vortex's unique tooth geometry promotes extended sprocket and chain life
• Direct Replacement or Gearing Upgrade — Compatible with matching 520-pitch chain setups for OEM replacement or performance tuning

The Vortex 604ZB-31 rear sprocket is part of Vortex Racing's trusted 604 series, a favorite among both track-day enthusiasts and performance street riders. Pair with a matching Vortex front sprocket and premium chain for a complete drivetrain upgrade.