Vortex 840AZOV4-42 Aluminum Rear Sprocket Series Sprockets - 42T 840

The Vortex 840AZOV4-42 is a 42-tooth aluminum rear sprocket designed for high-performance motorcycle applications using an 840-series chain. Vortex is a trusted name in the powersports industry, engineering sprockets to meet the demands of both street and track riders who expect precision fitment and reliable power transfer.

Key Features:

• 42-Tooth Configuration: Provides an optimal balance of acceleration and top-end performance for compatible applications
• Lightweight Aluminum Construction: CNC-machined aluminum reduces unsprung rotational weight compared to steel alternatives, improving throttle response and handling
• 840-Series Chain Compatibility: Engineered specifically for use with 840-pitch chains, ensuring proper engagement and reduced wear
• Precision CNC Machining: Tight tolerances ensure smooth chain tracking and consistent power delivery
• Durable Anodized Finish: Corrosion-resistant surface treatment helps protect the sprocket from the elements and extends service life
• Direct OEM-Style Fitment: Designed as a direct replacement for compatible OEM rear sprockets

Vortex sprockets are manufactured to strict quality standards and are a popular upgrade for riders looking to reduce drivetrain weight without sacrificing durability. The 840AZOV4-42 is sold as an individual rear sprocket.