Vortex 610BZB-42 Black 42-Tooth Aluminum Rear Sprocket 520 Chain

The Vortex 610BZB-42 is a black anodized aluminum rear sprocket featuring 42 teeth and designed for 520 chain pitch applications. CNC-machined in the USA to exacting tolerances, this sprocket delivers the precision fitment and durability that Vortex Racing is known for across both street and racing applications.

Key Features:

• 42-Tooth / 520 Chain Pitch — direct-fit rear sprocket for 520-pitch chain systems
• Lightweight Aluminum Construction — precision-machined from a specially formulated alloy to Vortex specifications, reducing rotating mass compared to steel
• Lightening Holes — strategically placed cutouts further reduce unsprung weight for improved throttle response
• Black Anodized Finish — corrosion-resistant black anodize with contrasting silver machined accents on the teeth and sweeps for a clean, aggressive look
• Vortex Patented Tooth Design — saber-tooth groove geometry engineered for extended sprocket life and smooth chain engagement
• 100% CNC Manufactured in the USA — tight tolerances ensure perfect concentricity and consistent performance

The Vortex 610BZB-42 is a direct upgrade over OEM sprockets, offering reduced rotating mass for improved acceleration feel without sacrificing durability. It pairs perfectly with Vortex or other quality 520-pitch motorcycle chains.