Vortex 625ZK-51 51-Tooth 625-Pitch Aluminum Rear Sprocket Black

The Vortex 625ZK-51 is a 51-tooth, 625-pitch aluminum rear sprocket finished in Vortex's ZK black hardcoat anodize. Engineered for street and road racing applications, this sprocket delivers a precise balance of lightweight performance and long-term durability, making it a popular upgrade over heavier OEM steel sprockets.

Key Features:

• 51-Tooth / 625 Pitch — Direct-fit rear sprocket for compatible 625-pitch drive chain applications
• ZK Black Hardcoat Finish — PTFE-infused black hardcoat anodizing bonds to the aluminum surface for increased wear resistance and reduced friction
• 7075-T6 Billet Aluminum Construction — Aerospace-grade alloy provides an exceptional strength-to-weight ratio, reducing rotating mass for improved throttle response
• 100% CNC Machined — Manufactured in the USA to tight tolerances for consistent, reliable fitment
• Patented Saber Tooth Groove Design — Vortex's unique tooth profile increases sprocket longevity and promotes smooth chain engagement
• Lightening Pockets — Strategic material removal reduces overall weight without compromising structural integrity

Vortex Racing is a U.S.-based manufacturer with decades of experience producing top-quality drivetrain components for Motocross, Supercross, Road Racing, and Flat Track Racing. Each sprocket is tested with feedback from professional race teams worldwide, ensuring race-proven reliability for both track and street riders.