Vortex 317KV4-40 Aluminum Rear Sprocket 40-Tooth

The Vortex 317KV4-40 is a lightweight aluminum rear sprocket featuring a 40-tooth configuration, precision-engineered for performance motorcycle applications. Manufactured in the USA, this sprocket is 100% CNC-machined from a specially formulated aluminum alloy to Vortex's exacting specifications, delivering the ideal balance of reduced rotating mass and long-term durability.

Key Features:

• 100% CNC Manufactured in the USA — machined to precise tolerances for concentricity and consistent performance
• Specially formulated aluminum alloy — developed per Vortex specifications for optimal strength-to-weight ratio
• Anodized finish — helps prevent corrosion and oxidation while providing a two-tone machined appearance
• Unique/patented tooth design — increases sprocket longevity and improves chain engagement
• Lightening holes — strategically placed to reduce rotating mass for improved acceleration and throttle response
• 40 teeth — allows gearing customization for improved low-end torque and acceleration

Vortex aluminum sprockets are a popular choice for road racing, track days, and performance street riding where weight savings are a priority. As with all aluminum sprockets, regular chain cleaning and tension checks every 300–400 miles are recommended to maximize service life.