Vortex 422ZK-51 CAT5 Black 51-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 422ZK-51 is a CAT5 series lightweight aluminum rear sprocket featuring a 51-tooth, 520-pitch configuration finished in a durable PTFE black hardcoat. Engineered for serious motorcycle racers and performance enthusiasts, this sprocket is 100% CNC machined in the USA to exacting tolerances and built to perform under the most demanding track conditions.

The black finish on this sprocket is not a simple anodize — it is a PTFE black hardcoat that chemically bonds to the aluminum surface, creating a harder, more durable finish with reduced friction compared to standard anodizing. The color anodizing is selectively applied, excluding the sweeps, mud grooves, and teeth, resulting in bright silver highlights that contrast against the black body for a distinctive race-ready appearance.

Key Features:

• 51 teeth, 520 pitch rear sprocket
• Lightweight CAT5 aluminum construction — specially formulated alloy per Vortex specifications
• 7075 T6 billet aluminum for maximum strength-to-weight ratio
• PTFE black hardcoat finish bonds to aluminum for a harder, lower-friction surface
• Saber tooth groove design — Vortex patented tooth profile increases sprocket longevity
• Drilled lightening holes reduce rotating mass
• 100% CNC manufactured in the U.S.A.
• Validated by top professional race teams worldwide

Vortex Racing has been producing top-quality motorcycle racing components for Motocross, Supercross, Road Racing, Flat Track, and Minibike applications for over 15 years. Every component is built to race-proven standards and tested with feedback from professional riders and championship teams.