Vortex 775BZK-51 Black Aluminum 51-Tooth 520-Pitch Rear Sprocket

The Vortex 775BZK-51 is a high-performance 51-tooth rear sprocket engineered for serious sport and track riders. Manufactured from lightweight 7075 aluminum with a durable black anodized finish, this sprocket offers a significant weight savings over OEM steel sprockets without sacrificing strength or longevity.

Vortex sprockets are precision CNC-machined to exact tolerances, ensuring smooth, quiet chain engagement and consistent power transfer from the engine to the rear wheel. The 775BZK-51 is designed for use with a 520-pitch chain, making it an ideal component for 520 conversion kits or OEM 520-equipped motorcycles.

Key Features:

• 51 teeth — increases acceleration and low-end torque for track or aggressive street riding
• 520 chain pitch compatibility
• 7075 aluminum construction — lightweight and strong
• Black anodized finish — corrosion resistant and visually aggressive
• CNC precision machined for exact fitment and smooth chain engagement
• Direct bolt-on replacement — no modifications required

Whether you're chasing lap times on the track or sharpening throttle response on your favorite back road, the Vortex 775BZK-51 rear sprocket delivers reliable, race-proven performance. Always pair with a quality 520-pitch chain for optimal drivetrain longevity.