Vortex 635AZK-43 CAT5 Black Aluminum 43-Tooth 530 Rear Sprocket

The Vortex 635AZK-43 is a CAT5 series black anodized aluminum rear sprocket featuring 43 teeth and 530 chain pitch. Engineered for performance street and track riders who demand lightweight precision hardware without sacrificing durability, this sprocket is a direct upgrade over heavy OEM steel units.

Key Features:

• Lightweight CAT5 aluminum construction — reduces rotating mass for improved acceleration and throttle response
• Precision CNC machined 100% in the USA to the tightest manufacturing tolerances
• Specially formulated 7075 aluminum alloy per Vortex specifications for optimal strength-to-weight ratio
• Black anodized finish applied first, then CNC machined to produce a striking black body with bright silver highlights on the swept surfaces and tooth faces
• Vortex patented saber-tooth groove design — unique tooth geometry increases chain engagement and extends sprocket longevity
• 530 chain pitch — compatible with standard 530 drive chains
• 43 teeth — suitable for stock or mildly modified gearing setups

The CAT5 line utilizes the same proven Vortex sprocket architecture with color anodizing that deliberately excludes the sweeps, mud grooves, and tooth faces — the result is a bold flash of black with contrasting machined silver accents. Trusted by racers and performance riders worldwide, Vortex rear sprockets are the benchmark for quality in the motorcycle aftermarket.