Vortex 491A-42 Silver 42-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 491A-42 is a 42-tooth, 520-pitch aluminum rear sprocket engineered for sport and performance motorcycles. Built from a specially formulated, lightweight aluminum alloy, this sprocket delivers the ideal balance of reduced rotating mass and long-lasting durability demanded by street and track riders alike.

Key Features:

• 42-Tooth / 520 Pitch: Designed for OEM 520-pitch chain applications or suitable 520 conversions
• Lightweight Aluminum Construction: CAT5 billet aluminum reduces rotating mass for improved acceleration, deceleration, and directional changes
• 100% CNC Machined: Manufactured in the USA to precise tolerances for superior concentricity and fitment
• Vortex Patented Saber Tooth Groove Design: Unique tooth profile increases sprocket longevity and is unlike any competing sprocket
• Silver Anodized Finish: Electrically coated for a bright, corrosion-resistant shine
• PTFE Black Hardcoat Option Available: Bonds to aluminum for a more durable surface with reduced friction (see 491AZK series)

Vortex Racing is a U.S.-based manufacturer with over 15 years of experience producing top-quality motorcycle racing components for Motocross, Supercross, Road Racing, Flat Track, and Minibikes. Every sprocket is tested with direct feedback from professional race teams worldwide, ensuring race-proven performance you can trust on the street or circuit.