Vortex 490ZR-51 Steel Rear Sprocket 520 Pitch 51 Tooth

The Vortex 490ZR-51 is a 520-pitch, 51-tooth steel rear sprocket engineered for riders who demand durability and reliable power transfer. Manufactured by Vortex Racing — a U.S.-based company with a long history of producing top-quality motorcycle racing components — this sprocket is built to withstand the rigors of both street and track use.

Key Features:

• 520 Pitch: Compatible with standard 520-series drive chains
• 51 Teeth: Higher tooth count for increased low-end torque and acceleration
• Carbon Steel Construction: Hardened teeth resist wear and maintain shape under demanding conditions
• Electro-Plated Satin Black Finish: Provides excellent corrosion resistance against the elements
• Weight-Reduction Cutouts: Strategic material removal lowers rotating mass to improve throttle response
• Precision Manufactured: CNC machined to tight tolerances for consistent concentricity and smooth chain engagement

The 490ZR-51 is an ideal replacement or performance upgrade for riders looking to optimize gearing for more aggressive acceleration. A higher rear tooth count delivers more low-end pulling power compared to a stock sprocket. Always replace the front sprocket and drive chain at the same time for optimal wear and performance.