Vortex 611ZK-51 Black 51-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 611ZK-51 is a 51-tooth, 520-pitch aluminum rear sprocket finished in a black anodized coating. Engineered by Vortex Racing — a U.S.-based manufacturer with decades of experience producing top-tier motorcycle drivetrain components — this sprocket is built to perform on the street and track alike.

Key Features:

• 51-Tooth, 520-Pitch: Optimized tooth count for enhanced low-end torque and acceleration
• Lightweight Aluminum Construction: Reduces rotating mass for improved throttle response and overall performance
• Black Anodized Finish: Durable protective coating that resists corrosion and wear while providing a clean appearance
• 100% CNC Machined: Precision-manufactured to tight tolerances for concentric, smooth chain engagement
• Vortex Patented Tooth Design: Saber tooth groove profile increases sprocket longevity and reduces chain wear
• Lightweight Cutouts: Strategic material removal reduces weight without compromising structural integrity
• Made in the USA: Manufactured by Vortex Racing, a trusted name in Motocross, Supercross, Road Racing, and Flat Track Racing

The Vortex 611ZK-51 is an ideal upgrade or direct replacement for riders looking to fine-tune their gear ratio for improved acceleration. The 520 pitch chain compatibility makes it well-suited for performance and race applications where weight savings and reliability are critical.