Vortex 523ZB-39 Series Steel Rear Sprocket Sprockets - 520 39-Tooth

The Vortex 523ZB-39 is a 39-tooth rear sprocket designed for motorcycles using a 520 series chain. Manufactured by Vortex Racing, this sprocket is part of the ZB line, constructed from high-strength steel with a zinc-plated finish for enhanced corrosion resistance and long service life.

Vortex sprockets are precision-machined to tight tolerances, ensuring smooth, consistent power transfer from the engine to the rear wheel. The steel construction provides excellent durability under demanding street and track conditions, making this sprocket a popular choice for riders seeking a reliable OEM-quality or performance replacement.

Key Features:

• Tooth Count: 39 teeth
• Chain Pitch: 520 series
• Material: High-strength steel with zinc-plated finish
• Precision CNC machined for accurate tooth profile and consistent engagement
• Direct OEM-style fitment for easy installation
• Suitable for street and track use

The Vortex 523ZB-39 rear sprocket is an excellent choice for riders looking to maintain or fine-tune their motorcycle's final drive ratio with a proven, quality component.