Vortex 604ZK-40 Aluminum Rear Sprocket 40-Tooth Black Anodized 530 Chain

The Vortex 604ZK-40 is a 40-tooth CNC-machined aluminum rear sprocket designed for motorcycles running a 530 pitch chain. Built in the USA by Vortex Racing, this sprocket is a go-to upgrade for street riders and racers who demand precision-manufactured drivetrain components.

Key Features:

• 40-Tooth, 530 Chain Pitch — engineered for correct fitment on 530-chain applications
• Black Anodized with Machined Contrasting Accents (ZK Finish) — corrosion-resistant finish with a distinctive two-tone appearance
• Lightweight Aluminum Construction — reduces rotating mass compared to OEM steel sprockets, improving throttle response and acceleration
• 100% CNC Manufactured in the USA — machined to tight tolerances using a specially formulated alloy per Vortex specifications
• Patented Unique Tooth Design — engineered to extend sprocket longevity and promote smooth chain engagement
• Direct Bolt-On Fitment — designed as a direct replacement for compatible OEM sprocket carrier configurations

Vortex Racing has been producing top-quality motorcycle drivetrain components since 1995, with products tested and validated by professional race teams worldwide. The 604ZK-40 is an excellent performance replacement for riders looking to maintain stock gearing or fine-tune their final drive ratio.