Vortex 201ZK-42 420 Rear Sprocket 42-Tooth Black Aluminum CAT5

The Vortex 201ZK-42 is a 420-pitch, 42-tooth CAT5 aluminum rear sprocket finished in black anodize, engineered for lightweight performance on small-displacement motocross and road racing applications. Precision-crafted in the USA from 7075 T6 aerospace-grade aluminum, this sprocket delivers an exceptional strength-to-weight ratio that reduces drivetrain rotating mass for sharper throttle response and improved acceleration.

Key Features:

• 420 chain pitch — 42-tooth rear sprocket
• Lightweight 7075 T6 aerospace aluminum construction reduces rotating mass
• 100% CNC machined in the USA to the tightest tolerances
• Black anodized finish for corrosion resistance and a clean appearance
• Vortex Ideal Tooth Design™ for optimized chain engagement, hold, and release
• Maximum wear resistance for extended service life
• Race-proven design tested by professional competitors worldwide

The 201ZK-42 is a direct-fit replacement or performance upgrade rear sprocket, delivering the same quality trusted by championship-level racers in a package suited for everyday track and off-road use.