Vortex 824ZK-42 Black Aluminum Rear Sprocket 42T

The Vortex 824ZK-42 is a 42-tooth black aluminum rear sprocket designed for motorcycles equipped with aftermarket wheels using the 824 bolt pattern. Part of Vortex Racing's ZK series, it features a striking black anodized finish with contrasting silver machined accents — delivering both race-level performance and aggressive styling.

Key Features:

• 42-Tooth rear sprocket for precise gearing tuning
• ZK Series finish: Black anodized with contrasting silver CNC-machined highlights
• 100% CNC manufactured in the USA from specially formulated aluminum alloy to Vortex specifications
• Lightweight aluminum construction reduces rotating mass for improved acceleration and deceleration response
• Vortex patented unique tooth design increases sprocket longevity and wear resistance
• Aftermarket wheel compatible — designed for specific aftermarket wheel bolt patterns (see fitment data)
• Black anodize treatment provides corrosion resistance and durable surface protection

Vortex Racing rear sprockets are a trusted choice among road racers, track day enthusiasts, and performance riders worldwide. The 824ZK-42 delivers the precision engineering and quality finish that Vortex is known for, making it an ideal upgrade or replacement sprocket for riders running aftermarket wheels.