Vortex 610BZK-40 Aluminum Rear Sprocket 40-Tooth 520 Pitch Black Anodized

The Vortex 610BZK-40 is a 40-tooth, 520-pitch aluminum rear sprocket finished in black anodize with contrast-machined accents. Designed for serious street and track riders, this sprocket is 100% CNC-manufactured in the USA to the tightest tolerances in the industry.

Key Features:

• Lightweight aluminum construction reduces rotating mass and improves power delivery to the rear wheel
• 100% CNC manufactured in the USA from a specially formulated alloy per Vortex specifications
• Black anodized finish with contrast-machined accents for corrosion resistance and distinctive appearance
• Vortex patented unique tooth design increases sprocket longevity and chain engagement
• 40 teeth, 520 pitch — compatible with 520-series chains
• Engineered to precise tolerances for true concentricity and smooth, reliable power transfer

Vortex Racing has been producing championship-proven drivetrain components for road racing, flat track, motocross, and supercross for over 15 years. The 610BZK-40 is an ideal choice for riders looking to replace worn OEM gearing or fine-tune their final drive ratio for improved acceleration.