Vortex 313ZK-45 Black 45-Tooth 520-Pitch Rear Sprocket

The Vortex 313ZK-45 is a black anodized CAT5 aluminum rear sprocket featuring 45 teeth and 520 pitch. Engineered for motorcycle performance applications, this sprocket is 100% CNC manufactured in the USA from a specially formulated aluminum alloy to Vortex's precise specifications.

Key Features:

• CAT5 Aluminum Construction – Lightweight, high-strength alloy reduces rotating mass for improved throttle response and acceleration
• 45-Tooth / 520-Pitch – Designed for 520-pitch chain systems; 45T configuration optimizes low-end torque and acceleration
• Black Anodized Finish – Hard anodizing provides corrosion resistance and a clean, aggressive appearance; color anodizing excludes sweeps, mud grooves, and teeth
• Unique Tooth Design – Vortex's proprietary tooth profile increases sprocket longevity and promotes smooth, efficient chain engagement
• 100% CNC Manufactured in the USA – Machined to the tightest tolerances for precise fit and consistent performance
• Direct Bolt-On Fit – Engineered as a direct OEM replacement or performance upgrade for compatible motorcycle applications

Vortex rear sprockets are a top choice among racers and performance-minded street riders. The reduced rotational mass of the lightweight aluminum construction helps deliver more power to the pavement, while the durable anodized finish ensures long service life. Upgrade your final drive gearing with the confidence of a product built to racing standards.