Vortex 641-51 Silver 51-Tooth Aluminum Rear Sprocket

The Vortex 641-51 is a silver, 51-tooth aluminum rear sprocket engineered for performance motorcycle applications. Built to the exacting standards that have made Vortex Racing a trusted name in road racing, motocross, and supercross competition, this sprocket delivers a precision-machined fit and long-lasting durability.

Key Features:

• 7075 T6 billet aluminum construction — lightweight yet extremely strong, reducing rotating mass for improved throttle response
• 100% CNC machined with Vortex's patented saber tooth groove design for superior longevity
• Lightening holes strategically placed to further reduce unsprung weight
• Silver finish — precision machined to exacting tolerances for concentricity and reliable chain engagement
• 51-tooth rear sprocket — ideal for riders seeking increased low-end torque and acceleration
• Manufactured in the USA to race-proven standards, tested with direct feedback from top professional racing teams

The Vortex 641-51 rear sprocket is a direct upgrade for riders who demand the same performance components used by championship-level competitors. Its unique tooth profile minimizes wear on both the sprocket and drive chain, extending the service life of your entire drivetrain.