Vortex 825ZRV4-40 Aluminum Rear Sprocket Chain Sprockets - 40-Tooth 825

The Vortex 825ZRV4-40 is a high-performance aluminum rear sprocket designed for motorcycles using an 825-series chain. Featuring a 40-tooth count, this sprocket is engineered for riders who demand precision, durability, and reduced unsprung weight over stock steel alternatives.

Vortex sprockets are CNC-machined from high-strength 7075-T6 aluminum and hard anodized for superior wear resistance and corrosion protection. The result is a lightweight yet durable sprocket that maintains tight tolerances for smooth, reliable power transfer.

Key Features:

• 40-Tooth rear sprocket configuration
• Compatible with 825-series chain
• CNC-machined from 7075-T6 aluminum for maximum strength-to-weight ratio
• Hard anodized finish for enhanced durability and corrosion resistance
• Precision tooth profile for smooth engagement and reduced chain wear
• Significant weight savings over OEM steel sprockets
• Direct OEM replacement fit — no modifications required

The Vortex 825ZRV4-40 is an ideal upgrade for performance-oriented riders looking to reduce rotating mass, improve throttle response, and extend drivetrain longevity. Vortex is a trusted name in the powersports industry, known for race-proven drivetrain components.