Vortex 543AZK-42 CAT5 42-Tooth Black Aluminum Rear Sprocket 520 Pitch

The Vortex 543AZK-42 is a CAT5 series 42-tooth aluminum rear sprocket designed for 520-pitch chain applications. CNC-machined in the USA from a specially formulated aluminum alloy to Vortex's exacting standards, this sprocket delivers the ideal combination of lightweight construction and long-lasting durability demanded by street and track riders alike.

Key Features:

• 42-Tooth / 520 Pitch — direct replacement sizing for compatible applications
• Lightweight aluminum construction — reduces rotating mass for improved acceleration, deceleration, and throttle response
• Black anodized finish — corrosion-resistant anodizing with machined accent highlights for an aggressive look
• 100% CNC manufactured in the USA — machined to precise tolerances for concentricity and consistent fit
• Vortex patented tooth profile — unique tooth geometry engineered to maximize sprocket longevity and chain engagement
• Specially formulated alloy — proprietary aluminum specification developed by Vortex Racing for optimal strength-to-weight ratio

Vortex Racing rear sprockets are a proven choice for motorcycle racers and enthusiasts competing in Road Racing, Supercross, Motocross, and Flat Track disciplines. Each sprocket is tested with direct feedback from professional race teams to ensure race-grade performance right out of the box.