Vortex 840ZK43 CAT5 Rear Aluminum Sprocket 43T Black for Aftermarket Wheels

The Vortex 840ZK43 is a CAT5 series lightweight aluminum rear sprocket featuring a 43-tooth count, engineered specifically for motorcycles equipped with BST, Rotobox, and Core Moto Apex-6 aftermarket wheels. Built to racing standards, this sprocket delivers the performance, precision, and durability demanded by serious track and street riders alike.

Key Features:

• Lightweight CAT5 aluminum construction — significantly reduces rotating mass compared to OEM steel sprockets, improving acceleration and handling response
• 100% CNC manufactured in the USA — precision machined to the tightest tolerances for consistent, reliable performance
• Specially formulated alloy per Vortex specifications — proprietary aluminum alloy selected for the optimal balance of strength and weight
• Black anodized finish — corrosion-resistant anodizing with contrasting silver machine cuts on sweeps, mud grooves, and teeth for a distinctive appearance
• Patented saber tooth groove design — Vortex's unique tooth profile increases sprocket longevity and is unlike any other sprocket on the market
• 43-tooth rear sprocket — optimized tooth count for fine-tuned gearing adjustments
• 840 wheel fitment pattern — designed to fit BST, Rotobox, and Core Moto Apex-6 aftermarket wheels

Vortex Racing has been manufacturing top-quality racing components in the USA since 1995. Owned and operated by motorcycle racers, every component is tested on the track with direct feedback from top professional race teams worldwide. The CAT5 rear sprocket is a proven upgrade for riders looking to reduce drivetrain weight and sharpen performance.