Vortex 491A-66 Silver 66-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 491A-66 is a 66-tooth, 520-pitch aluminum rear sprocket designed for high-performance motorcycles. Engineered for street stunt riders and performance enthusiasts who demand extreme gear reduction, this large-tooth sprocket delivers maximum low-end torque and aggressive acceleration.

Key Features:

• Material: Precision-machined 7075 T6 aluminum for an ideal balance of strength and reduced rotating mass
• Tooth Count: 66 teeth for maximum gear reduction and low-speed torque
Chain Pitch: 520 pitch — compatible with standard 520 chain
• Finish: Silver anodized for corrosion resistance and a clean look
• CNC Machined: Manufactured to precise tolerances for optimal concentricity and chain engagement
• Lightening Holes: Strategically placed cutouts reduce rotating mass without sacrificing structural integrity
• Patented Tooth Design: Vortex's unique saber tooth groove profile extends sprocket life and improves chain retention

The 491A-66 is a popular choice for stunt riding builds where riders need dramatically increased rear sprocket size over stock. Available in the 491A series, this sprocket is a direct bolt-on replacement for compatible applications running a 520-pitch chain. Whether building a dedicated stunt bike or looking for maximum pull off the line, the Vortex 491A-66 delivers proven race-quality performance.