Vortex 491AK-43 Black 43-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 491AK-43 is a black, 43-tooth, 520-pitch aluminum rear sprocket engineered for sport and performance motorcycles. Built to Vortex's exacting standards, this sprocket delivers a direct OEM-style replacement or 520-conversion upgrade with race-proven durability and precision fitment.

Key Features:

• 43 Teeth / 520 Pitch — Compatible with 520-size drive chains for OEM replacement or suitable 520 chain conversions
• Lightweight CAT5 Aluminum Construction — Reduces unsprung and rotating mass for improved throttle response and handling
• 100% CNC Manufactured in the USA — Machined to the tightest tolerances for superior concentricity and smooth power delivery
• Specially Formulated Alloy — Proprietary Vortex aluminum alloy specification for optimal strength-to-weight ratio
• Black Hardcoat Finish (PTFE) — Polytetrafluoroethylene (Teflon) coating adds lubricity and significantly increases wear resistance and longevity
• Patented Vortex Tooth Design — Unique saber-tooth groove geometry extends sprocket life and improves chain engagement

Vortex Racing has been manufacturing high-performance motorcycle drivetrain components since 1995, with products trusted by professional racers and everyday sport riders alike. The 491AK-43 rear sprocket is the black anodized variant of the 491A series, offering the same race-quality performance with an aggressive black aesthetic.