Vortex 251AZGV4-42 Aluminum Rear Sprocket Pitch Green Sprockets - CAT5 V4 520 42-Tooth

The Vortex 251AZGV4-42 is a 42-tooth, 520-pitch aluminum rear sprocket finished in a bold green anodized color with contrasting silver machine-cut highlights. Built on Vortex's new V4 platform, this sprocket delivers race-proven performance straight from the factory floor in the USA.

Key Features:

• Lightweight aluminum construction — significantly reduces rotating mass compared to OEM steel sprockets, improving throttle response and acceleration
• 100% CNC manufactured in the U.S.A. — machined to tight tolerances using a specially formulated alloy per Vortex specifications
• V4 sprocket design — Vortex's updated design platform offering refined geometry for improved chain engagement and longevity
• Saber tooth grooves — unique tooth profile increases sprocket life and promotes smooth chain engagement
• Green anodized finish — color anodizing applied to the body with bright silver highlights on the machined surfaces for a distinctive look
• 520 pitch — compatible with 520-pitch chains for OEM replacement or 520 conversion applications
• 42 teeth — maintains a favorable gear ratio for balanced acceleration and top-speed performance

Vortex sprockets are trusted by professional race teams worldwide and are engineered to meet the demands of road racing, track days, and high-performance street riding. The 251AZGV4-42 is a direct-fit rear sprocket designed to match specific motorcycle applications — always verify fitment before ordering.