Vortex 642AV4-40 VTX Aluminum Rear Sprocket 40-Tooth

The Vortex 642AV4-40 is a 40-tooth aluminum rear sprocket engineered for performance motorcycle applications. Part of Vortex's renowned VTX aluminum sprocket series, this sprocket is 100% CNC machined in the USA to exacting tolerances, ensuring precise concentricity and a perfect chain fit every time.

Key Features:

• 7075-T6 billet aluminum construction — premium aerospace-grade alloy formulated to Vortex specifications for maximum strength-to-weight ratio
• 40-tooth rear sprocket for precise gear ratio tuning
• Saber tooth groove design — Vortex's patented tooth profile improves chain engagement and extends sprocket longevity
• Lightweight design reduces rotating mass for improved acceleration, deceleration, and directional response
• Silver anodized finish protects against corrosion and provides a bright, clean appearance
• Lightening holes further reduce unsprung weight without compromising structural integrity
• Manufactured 100% in the U.S.A.

Vortex aluminum rear sprockets are a trusted choice among racers and performance riders who demand precision-engineered drivetrain components. The 642AV4-40 is designed as a direct-fit replacement or performance upgrade, delivering measurable improvements in throttle response and overall drivetrain efficiency.