Vortex 628-51 Aluminum Rear Sprocket 428 Pitch 51 Tooth

The Vortex 628-51 is a lightweight aluminum rear sprocket featuring 51 teeth and designed for 428 pitch chain applications. Engineered by Vortex Racing — a U.S.-based manufacturer with a long-standing reputation in competitive motorsports — this sprocket delivers the precision and durability demanded by both racers and performance-oriented street riders.

Key Features:

• Lightweight CAT5 aluminum construction reduces rotating mass for improved throttle response and acceleration
• 100% CNC machined in the USA to tight tolerances for precise fit and concentricity
• Specially formulated alloy developed to Vortex's proprietary specifications for optimal strength-to-weight ratio
• Vortex patented sprocket tooth design for extended sprocket longevity and consistent chain engagement
• Lightening holes further reduce overall weight without compromising structural integrity
• 428 pitch chain compatibility — suited for smaller-displacement motorcycles and minibikes
• 51-tooth rear sprocket for tuned gear ratio and enhanced low-end torque delivery

Vortex Racing products are tested on the track with direct feedback from professional race teams worldwide, ensuring every component meets the demands of high-performance riding. The 628-51 rear sprocket is an ideal upgrade for riders looking to fine-tune their drivetrain gearing or replace a worn OEM sprocket with a race-proven alternative.