Vortex 436ZK-45 Black 45-Tooth 530-Pitch Aluminum Rear Sprocket

The Vortex 436ZK-45 is a 45-tooth, 530-pitch black anodized aluminum rear sprocket engineered for high-performance motorcycle applications. Manufactured entirely in the USA using a specially formulated aluminum alloy developed to Vortex's own exacting specifications, this sprocket delivers the weight savings and precision that serious riders demand on the street and track.

Constructed from lightweight CAT5 aluminum, this sprocket reduces rotating mass compared to steel counterparts, helping put more power to the pavement without sacrificing durability. The black anodized finish is applied before the sprocket teeth are CNC-machined, producing the distinctive two-tone black and silver machined look that Vortex sprockets are known for. The anodized coating also provides corrosion resistance to keep the sprocket looking and performing its best.

Key Features:

• 45 teeth, 530 pitch — matches OEM chain pitch for direct replacement
• Lightweight CAT5 aluminum construction — significantly lighter than steel for reduced rotating mass
• 100% CNC manufactured in the USA — tight tolerances for precise chain engagement
• Specially formulated alloy per Vortex Racing specifications
• Black anodized finish with contrasting silver machined cuts — applied pre-cut for the iconic two-tone appearance
• Patented Vortex tooth design — unique profile engineered to increase sprocket longevity
• Rear sprocket position — direct bolt-on replacement for compatible applications

Vortex Racing has been a trusted name in motorcycle racing components for over 15 years, supplying teams and riders competing in Road Racing, Motocross, Supercross, Flat Track, and Drag Racing. The 436ZK bolt pattern is designed for the Hayabusa (1999–2007) and SRAD-era Suzuki sportbikes. For optimal longevity, chain cleaning and tension should be checked every 300–400 miles when running aluminum sprockets.