Vortex 839ZR-51 Rear Sprocket Aluminum Racing Sprockets - 51-Tooth

The Vortex 839ZR-51 is a lightweight aluminum rear sprocket designed for high-performance motorcycle applications. This 51-tooth sprocket features Vortex Racing's signature engineering quality, combining race-proven durability with weight-saving construction to reduce rotating mass and improve power delivery to the rear wheel.

Key Features:

• 51-tooth rear sprocket configuration
• 100% CNC manufactured in the USA to exacting tolerances
• Specially formulated aluminum alloy per Vortex specifications
• Anodized finish to prevent corrosion and provide long-lasting protection
• Unique tooth design increases sprocket longevity
• Vortex patented sprocket design unlike any other sprocket
• Lightweight construction reduces rotating mass for improved acceleration

Vortex Racing has been manufacturing top-quality motorcycle racing components since 1995, with products tested on the track by professional race teams worldwide. Each race component is made to the tightest tolerances with the best quality materials for the application, ensuring reliability in demanding motocross, supercross, road racing, and flat track racing environments.