Vortex 610ZO-42 520 Aluminum Rear Sprocket 42-Tooth Silver

The Vortex 610ZO-42 is a 520-pitch, 42-tooth aluminum rear sprocket finished in silver anodize. Engineered for street and performance motorcycle applications, this sprocket is 100% CNC-manufactured in the USA from a specially formulated aluminum alloy to Vortex's exacting tolerances—delivering the concentricity and durability that racers and riders demand.

Key Features:

• 520 Chain Pitch — Compatible with 520-pitch drive chains
• 42 Teeth — Stock-replacement or gearing-tune tooth count
• Lightweight Aluminum Construction — Reduces rotating mass compared to OEM steel sprockets for improved acceleration and throttle response
• Lightening Holes — Additional material removal further reduces unsprung rotational weight
• Silver Anodized Finish — Corrosion-resistant anodize protects the alloy and provides a clean, classic appearance
• Vortex Patented Tooth Design — Unique saber-tooth profile increases sprocket longevity and promotes smooth chain engagement
• 100% CNC Machined in the USA — Manufactured to tight tolerances for precise fit and concentricity
• Specially Formulated Alloy — Aerospace-grade aluminum per Vortex specifications balances strength and weight

The Vortex 610ZO-42 is a direct-fit rear sprocket engineered as a high-performance replacement or gearing upgrade. Whether maintaining stock drive ratios or fine-tuning acceleration characteristics, this sprocket delivers the quality and performance consistency that has made Vortex a trusted name in motorcycle drivetrain components.