Vortex 251AZBV4-42 Aluminum Rear Sprocket Pitch Violet Sprockets - CAT5 520 42-Tooth

The Vortex 251AZBV4-42 is a CAT5 aluminum rear sprocket featuring a 520 pitch and 42 teeth, finished in a striking violet anodized color. Designed for performance-oriented street and track riders, this sprocket delivers a significant weight savings over OEM steel units, reducing rotating mass for sharper throttle response and improved acceleration.

Key Features:

• Lightweight CAT5 aluminum construction — reduces rotating mass compared to stock steel sprockets for improved acceleration and handling
• 100% CNC manufactured in the U.S.A. — precision machined to tight tolerances for consistent fit and performance
• Specially formulated alloy per Vortex specifications — engineered for an optimal balance of strength and weight
• Vortex patented saber tooth groove design — unique tooth profile increases sprocket longevity and chain engagement
• Violet anodized finish — color anodizing applied to the body of the sprocket with bright silver machined highlights on the teeth and edges
• 520 pitch, 42-tooth — suitable for OEM 520 applications or compatible 520 chain conversions

Vortex Racing is a U.S.-based manufacturer with over 15 years of experience producing top-quality motorcycle racing components. Their sprockets are tested on the track with direct feedback from professional race teams worldwide, making this an ideal upgrade for riders seeking race-proven drivetrain performance.