Vortex 823ZK-40 CAT5 Aluminum Rear Sprocket 40T Black

The Vortex 823ZK-40 is a 40-tooth CAT5 aluminum rear sprocket finished in a sleek black anodize. Designed for sport bike and road racing applications, this sprocket delivers the lightweight performance and precision engineering that Vortex Racing is known for worldwide.

Key Features:

• 100% CNC machined in the USA to the tightest tolerances in the industry
• CAT5 aerospace-grade aluminum construction dramatically reduces unsprung weight versus steel
• Black anodized finish for corrosion resistance and a clean, race-ready appearance
• 40-tooth count for precise drive ratio tuning
• Patented Vortex tooth profile for extended sprocket and chain life
• Induction-hardened tooth surfaces for superior wear resistance
• Direct bolt-on replacement — no modifications required

Vortex Racing has been a trusted name in high-performance motorcycle components since 1995, with products proven at the highest levels of AMA Superbike, World Superbike, and motocross competition. The 823ZK-40 is an ideal upgrade for riders looking to reduce rotating mass, fine-tune gearing, or replace a worn OEM sprocket with a race-quality component.