Vortex 491A-63 Silver 63-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 491A-63 is a 63-tooth, 520-pitch aluminum rear sprocket engineered for riders who demand precision, durability, and performance-driven gearing. Manufactured in the USA, this sprocket is part of Vortex's renowned 491A series — a go-to choice among street and track riders alike.

Key Features:

• 520 Pitch: Compatible with 520-size chain systems, including OEM replacements and pitch-conversion setups
• 63-Tooth Count: High tooth count delivers increased low-end torque and acceleration, ideal for technical or aggressive riding applications
• Lightweight Aluminum Construction: Reduces rotating mass compared to steel sprockets, improving throttle response and overall handling
• 100% CNC Machined: Precision-manufactured to tight tolerances for optimal concentricity and smooth chain engagement
• Vortex Patented Saber Tooth Groove Design: Unique tooth profile engineered to extend sprocket service life
• Silver Anodized Finish: Electrically coated with a Cat 5 clear anodize for a bright appearance and added corrosion resistance
• Made in the USA: Produced to Vortex's exacting quality standards at their domestic facility

The 491A-63 is a direct bolt-on replacement or gearing upgrade for motorcycles running a 520-pitch drivetrain. The large 63-tooth rear sprocket significantly shortens overall gearing, maximizing low-speed torque and acceleration performance. Pair with a matching 520-pitch front sprocket and chain for a complete drivetrain solution.