Vortex 312DZB-51 Dark Zinc Black 51-Tooth Steel Rear Sprocket

The Vortex 312DZB-51 is a 51-tooth steel rear sprocket finished in Vortex's durable Dark Zinc Black (DZB) electroplated coating. Engineered for motorcycles and powersports applications, this sprocket is laser-cut from high-strength carbon steel alloy to Vortex's precise specifications, delivering reliable power transfer and extended service life.

Key Features:

• 51-Tooth Configuration – Increases rear wheel torque multiplication for improved low-end pull and acceleration response
• Dark Zinc Black (DZB) Finish – Electroplated satin-black coating provides excellent corrosion resistance and a stealthy appearance
• Carbon Steel Construction – Laser-cut from carbon steel alloy per Vortex specifications for strength and long service life
• Hardened Teeth – Case-hardened tooth profiles resist wear under sustained high-load conditions
• Vortex Patented Tooth Design – Unique tooth geometry reduces chain wear and improves chain engagement longevity
• Lightening Holes – Strategically placed cutouts reduce rotating mass without sacrificing structural integrity
• 100% USA Manufactured – CNC machined in the United States to tight tolerances for precise concentricity and fitment

Vortex Racing has been producing top-quality motorcycle drivetrain components since 1995, with products proven on the track by professional racing teams worldwide. The 312DZB-51 rear sprocket is a direct-fit replacement or performance gearing upgrade suitable for street and competition use.