Vortex 313ZO-42 CAT5 Aluminum Rear Sprocket 520 Pitch 42-Tooth

The Vortex 313ZO-42 is a 42-tooth, 520-pitch CAT5 aluminum rear sprocket engineered for high-performance motorcycle applications. Manufactured in the USA from aerospace-grade 7075-T6 billet aluminum, this sprocket delivers an excellent balance of lightweight construction and durability for street and track use.

Key Features:

• 42-Tooth / 520 Pitch — direct-fit replacement or performance upgrade for compatible 520-chain drive systems
• 7075-T6 Billet Aluminum — reduces rotating mass for improved acceleration, deceleration, and directional response
• Vortex Patented Tooth Profile — unique tooth geometry engineered to extend sprocket and chain life
• PTFE Black Hardcoat Anodizing (ZO finish) — bonds to the aluminum surface for enhanced hardness, reduced friction, and corrosion resistance
• CNC Precision Machined — manufactured to tight tolerances for concentric, smooth, and quiet power delivery
• Lightweight Design — less rotating mass compared to steel sprockets for performance gains
• Made in the USA — produced at Vortex Racing's U.S. facility to strict quality standards

Vortex Racing has supplied top professional race teams and championship-winning riders across Motocross, Supercross, Road Racing, and Flat Track disciplines. The 313ZO-42 is a proven performance upgrade for riders looking to reduce unsprung weight and optimize their drive system.