Vortex 840ZKV4-43 Aluminum Rear Sprocket 43T BST Rotobox Black Silver

The Vortex 840ZKV4-43 is a 43-tooth lightweight aluminum rear sprocket engineered for high-performance motorcycle applications. Designed specifically for aftermarket wheel fitments including BST, Rotobox, and Core Moto Apex-6 wheels, this sprocket delivers race-proven performance on both the street and track.

Key Features:

• 100% CNC machined in the USA to the tightest tolerances for precise fit and performance
• Specially formulated aluminum alloy per Vortex specifications — lightweight construction reduces rotating mass
• Black anodized finish with contrasting silver machined accents for corrosion resistance and premium aesthetics
• Vortex patented unique tooth design increases sprocket longevity and optimizes chain engagement
• 43-tooth rear sprocket for tunable gearing to suit your riding style or race application
• Sprocket pattern: 840 series — 5-bolt, 10mm holes, 100mm PCD (Pitch Circle Diameter), 76mm sprocket ID

2-4 lbs

Vortex Racing has been manufacturing top-quality motorcycle racing components from its USA facility since 1995. Every sprocket is built to exacting standards and tested with direct feedback from professional race teams worldwide, making the 840ZKV4-43 a trusted upgrade for serious riders.