Vortex 491AZK-42 Aluminum Rear Sprocket 42-Tooth

The Vortex 491AZK-42 is a high-performance 42-tooth aluminum rear sprocket designed as a direct-fit replacement or performance upgrade for compatible motorcycles. Machined from lightweight 7075-T6 aluminum and finished with a hard anodized coating, this sprocket delivers excellent wear resistance while significantly reducing unsprung rotational weight compared to steel alternatives.

Key Features:

• 42-tooth rear sprocket configuration
• Lightweight 7075-T6 aluminum construction
• Hard anodized finish for corrosion and wear resistance
• CNC-machined for precise tooth geometry and consistent chain engagement
• Direct bolt-on fitment — no modifications required
• Compatible with standard 520, 525, or 530 chain pitch (verify for specific application)

Vortex Racing is a trusted name in the powersports industry, known for producing precision-machined drivetrain components used by both street riders and professional racers. The 491AZK-42 is an ideal choice for riders looking to fine-tune their gearing for acceleration, top speed, or track performance.