Vortex 151ZR-40 CAT5 420 Rear Sprocket 40-Tooth Red

The Vortex 151ZR-40 is a CAT5 aluminum rear sprocket featuring a 420 chain pitch and 40 teeth, finished in a distinctive red anodized color with contrasting silver CNC-machined highlights. Designed for mini bikes and small-displacement motorcycles, this sprocket delivers a meaningful performance upgrade over stock steel units.

Key Features:

• 420 Chain Pitch — engineered for mini bike and pit bike applications
• 40-Tooth rear sprocket for tuned gearing and improved low-end acceleration
• CAT5 aluminum construction — lightweight 7075 T6 aerospace-grade aluminum reduces rotating mass
• Red anodized finish with contrasting silver CNC-machined cuts for a race-ready appearance
• Patented M-Tooth (saber tooth) groove design increases sprocket longevity and improves chain engagement
• 100% CNC machined to tight tolerances for improved concentricity, resulting in a stronger, quieter, and longer-lasting sprocket
• Weight-saving lightening cutouts to minimize unnecessary rotating mass
• Made in the USA

The Vortex CAT5 series is purpose-built for riders who want race-proven quality on the street or track. The lightweight aluminum construction significantly reduces drivetrain rotating mass compared to OEM steel sprockets, translating to sharper throttle response and improved acceleration.