Vortex 817ZK-51 Black Aluminum Rear Sprocket 51-Tooth

The Vortex 817ZK-51 is a 51-tooth black anodized aluminum rear sprocket engineered for high-performance motorcycle applications. 100% CNC-machined in the USA, this sprocket is built to the exacting tolerances that Vortex Racing is known for across Motocross, Supercross, Road Racing, and Flat Track disciplines.

Key Features:

• 51-tooth rear sprocket for optimized gear ratio tuning
• Black anodized finish for corrosion resistance and aggressive styling
• Manufactured from a specially formulated aluminum alloy per Vortex specifications
• 100% CNC manufactured in the USA to precise tolerances
• Lightweight construction reduces rotating mass for improved throttle response
• Vortex patented unique tooth design for increased sprocket longevity
• Drilled lightening holes on most applications for additional weight savings

Vortex rear sprockets are a top choice for riders seeking a performance upgrade over OEM gearing. Moving to a higher tooth count like the 51T increases low-end torque and acceleration, making this sprocket ideal for technical tracks and street riding where quick throttle response is prioritized.