Vortex 611ZK-39 Black Aluminum Rear Sprocket 39T

The Vortex 611ZK-39 is a 39-tooth black anodized aluminum rear sprocket designed as a direct-fit, high-performance replacement for compatible motorcycles. Part of Vortex Racing's renowned sprocket lineup, the 611ZK series is precision-engineered to deliver reliable power transfer, reduced rotating mass, and extended drivetrain life.

Key Features:

• 39-Tooth Rear Sprocket — bolt-on replacement for stock or performance gearing setups
• Black Anodized Aluminum Construction — lightweight design reduces rotating mass for improved throttle response and acceleration
• CNC Machined in the USA — manufactured to precise tolerances for concentricity and smooth chain engagement
• Vortex Patented Tooth Profile — unique tooth geometry promotes even chain wear and maximizes sprocket longevity
• Corrosion-Resistant Finish — hard anodized black coating protects against wear and the elements
• Direct OEM Replacement Fitment — uses the 611 carrier pattern for a no-modification installation

Vortex Racing sprockets are a trusted choice among street riders and racers alike. The 611ZK-39 delivers the ideal balance of lightweight performance and durability, making it an excellent upgrade or replacement for your motorcycle's stock rear sprocket.