Vortex 491ZK-50 Steel Rear Sprocket 50-Tooth

The Vortex 491ZK-50 is a 50-tooth steel rear sprocket designed for high-performance motorcycle applications. Vortex Racing is a trusted name in the motorsport community, manufacturing precision-machined sprockets to exacting tolerances for reliable power transfer and consistent chain engagement.

Key Features:

• 50-tooth rear sprocket for increased low-end torque and acceleration
• Manufactured from high-quality steel for excellent durability and wear resistance
• Precision CNC-machined for accurate tooth profile and consistent fitment
• Part of Vortex's 491 series rear sprocket lineup
• ZK designation indicates sprocket and carrier kit configuration
• Compatible with standard chain pitches for the applicable platform

Upgrading to a higher-tooth-count sprocket like the 491ZK-50 reduces overall gearing, delivering quicker acceleration and improved throttle response — ideal for tight circuits, motocross tracks, or aggressive street riding. Vortex sprockets are a popular OEM-quality replacement and performance upgrade trusted by racers worldwide.