Vortex 225K-51 Black Hardcoat Aluminum Rear Sprocket 520 Pitch 51-Tooth

The Vortex 225K-51 is a 51-tooth, 520-pitch aluminum rear sprocket featuring a black hardcoat anodized finish. Engineered for motorcycle road racing, motocross, supercross, flat track, and performance street riding, this sprocket delivers an ideal balance of lightweight performance and extended durability.

Key Features:

• 520 Chain Pitch – Compatible with standard 520-pitch drive chains
• 51 Teeth – Provides increased low-end torque and acceleration advantage over stock gearing
• Black Hardcoat Anodized Finish – Enhanced surface hardness for improved wear resistance and corrosion protection compared to standard clear-coat aluminum sprockets
• Lightweight Aluminum Construction – Approximately half the weight of a steel sprocket, reducing rotating mass for improved throttle response
• Drilled Lightening Holes – Further reduces rotating mass without sacrificing structural integrity
• Vortex Patented Tooth Design – Unique profile engineered to increase sprocket longevity and chain engagement
• 100% CNC Manufactured in the USA – Machined to tight tolerances from a specially formulated alloy per Vortex specifications

Vortex Racing has been producing top-quality motorcycle racing components for over 15 years, with direct feedback from professional race teams worldwide. The 225K-51 is the ideal upgrade for riders looking to improve acceleration and reduce drivetrain weight with a proven, race-tested sprocket.