Vortex 312ZK-42 Aluminum Rear Sprocket 42-Tooth ZK Series

The Vortex 312ZK-42 is a 42-tooth aluminum rear sprocket from Vortex Racing's ZK series, designed as a direct-fit replacement or performance upgrade for compatible motorcycles. Engineered to race-proven standards, this sprocket delivers the precision and durability that Vortex Racing is renowned for across road racing, superbike, and sport bike applications.

Key Features:

• 42-Tooth Configuration: Optimized tooth count for balanced acceleration and top-end performance
• Lightweight Aluminum Construction: Reduces rotating mass for improved throttle response and overall performance
• 100% CNC Manufactured in the U.S.A. to the tightest tolerances in the industry
• Specially Formulated Alloy: Made to Vortex's own alloy specifications for superior strength-to-weight ratio
• Patented Saber Tooth Groove Design: Unique tooth geometry increases sprocket longevity and reduces chain wear
• Anodized Finish: Helps prevent corrosion and adds a clean, race-ready appearance
• ZK Series Bolt Pattern: Direct-fit design for compatible motorcycle models

Vortex Racing sprockets are the choice of professional racers competing in AMA Superbike, AMA Sportbike, Supercross, and motocross. The 312ZK-42 delivers the same championship-level quality and precision in a bolt-on rear sprocket built to outlast the competition.