Vortex 817ZB-51 Black 51-Tooth Steel Rear Sprocket

The Vortex 817ZB-51 is a 51-tooth steel rear sprocket finished in an electro-plated satin black coating for corrosion resistance. Engineered by Vortex Racing — a U.S.-based manufacturer of top-quality motorcycle racing components since 1995 — this sprocket is built to exacting tolerances for reliable performance on the street or track.

Vortex steel rear sprockets are manufactured from a carbon steel alloy formulated to Vortex's own specifications, with hardened teeth designed to resist wear over thousands of miles. The satin black electro-plate finish protects against rust and corrosion while giving the sprocket a clean, aggressive look. Vortex's patented tooth profile is uniquely shaped to extend sprocket life and promote smooth, efficient chain engagement.

Key Features:

• 51-tooth rear sprocket for increased low-end torque and acceleration
• Carbon steel alloy construction per Vortex specifications for strength and durability
• Electro-plated satin black finish for corrosion resistance
• Unique, patented Vortex tooth profile for extended sprocket longevity
• Hardened teeth resist wear under demanding riding conditions
• 100% manufactured in the USA

The 817ZB-51 is part of Vortex's steel rear sprocket lineup, offering a heavier-duty alternative to aluminum sprockets — ideal for riders who prioritize longevity and durability. Always replace the front sprocket and chain simultaneously when installing a new rear sprocket to ensure proper wear and performance.