Vortex 604ZL-51 Aluminum Rear Sprocket 51T

The Vortex 604ZL-51 is a high-performance 51-tooth aluminum rear sprocket engineered for competitive motorcycle riders seeking improved acceleration and drivetrain efficiency. Machined from lightweight 7075-T6 or 6061-T6 aluminum alloy, this sprocket delivers an exceptional strength-to-weight ratio over stock steel sprockets, reducing unsprung rotational mass for sharper throttle response.

Vortex sprockets are precision CNC-machined to exacting tolerances, ensuring smooth chain engagement and consistent power transfer. The hard-anodized finish provides corrosion resistance and extended wear life under demanding track and street conditions.

Key Features:

• 51 teeth — tuned for increased low-end torque and acceleration
• Lightweight aluminum construction reduces unsprung weight vs. stock steel
• Hard-anodized finish for corrosion and wear resistance
• CNC machined to precise tolerances for smooth, quiet operation
• Direct OEM-style bolt-on fitment — no modifications required
• Compatible with standard motorcycle drive chain specifications

The Vortex 604ZL-51 is an ideal upgrade for riders looking to fine-tune their gearing for track days, racing, or aggressive street riding. Always replace the front sprocket and drive chain simultaneously for optimal drivetrain longevity.