Vortex 313ZL-42 Steel Rear Sprocket 42-Tooth Black

The Vortex 313ZL-42 is a 42-tooth steel rear sprocket engineered for high-performance motorcycle applications. Built to Vortex Racing's exacting standards, this sprocket delivers the durability and precision required by both competitive racers and performance street riders.

Key Features:

• Carbon steel alloy construction manufactured to Vortex specifications for maximum strength and longevity
• Satin black electro-plated finish provides corrosion resistance and a clean, aggressive appearance
• Vortex patented tooth design reduces wear and extends sprocket life compared to conventional designs
• 42-tooth rear sprocket for optimized gear ratio tuning — ideal for improved low-end torque and acceleration
• 100% CNC manufactured in the USA to the tightest tolerances in the industry
• Engineered for direct OEM-style fitment with no modifications required

Vortex Racing is a U.S.-based manufacturer with over 15 years of experience producing race-proven drivetrain components for motocross, supercross, road racing, and flat track. Replacing your rear sprocket with the 313ZL-42 is a straightforward upgrade that can meaningfully improve acceleration and overall drivetrain performance.