Vortex 639ZK-47 Steel Rear Sprocket 47-Tooth Black

The Vortex 639ZK-47 is a 47-tooth steel rear sprocket finished in black, designed as a direct-fit replacement or performance upgrade for compatible motorcycles. Built to Vortex's exacting standards, this sprocket delivers the durability and reliability that street and track riders demand.

Key Features:

• 47-Tooth Rear Sprocket — optimized tooth count for enhanced low-end torque and acceleration
• Carbon Steel Construction — manufactured from carbon steel alloy per Vortex specifications for long-lasting durability
• Black Finish — electroplated satin black coating helps resist corrosion and provides a clean, aggressive look
• Patented Tooth Design — Vortex's unique tooth profile increases sprocket longevity and reduces chain wear
• Precision Manufactured — machined to precise tolerances for concentricity, ensuring smooth, quiet operation
• Direct Replacement — model-specific fitment for straightforward installation with no modifications required

Whether you're replacing a worn sprocket or fine-tuning your gearing ratio for more aggressive acceleration, the Vortex 639ZK-47 steel rear sprocket is a proven upgrade trusted by motorcycle enthusiasts and racers alike.