Vortex 840AKV4-40 VTX Aluminum Rear Sprocket Chain Sprockets - 40-Tooth 520

The Vortex 840AKV4-40 is a 40-tooth aluminum rear sprocket engineered for motorcycle racing applications using a 520 chain pitch. Part of Vortex's renowned 840 sprocket series, this sprocket is designed for riders who demand precision, durability, and reduced rotating mass on the track or street.

Key Features:

• 100% CNC manufactured in the USA to the tightest tolerances for precise fitment and performance
• Constructed from a specially formulated aluminum alloy per Vortex specifications for optimal strength-to-weight ratio
• Lightweight design reduces rotating mass, improving acceleration, deceleration, and directional response
• Unique saber-tooth groove design increases sprocket longevity and is unlike any competing sprocket on the market
• Silver anodized finish helps resist corrosion and provides a clean, race-ready appearance
• Compatible with 520 chain pitch — ideal for stock or converted 520 chain setups
• 40 teeth for optimized gearing balance between top speed and acceleration

Vortex Racing has been manufacturing top-quality motorcycle racing components in the USA since 1995. Every sprocket is built to exacting standards and tested with feedback from professional race teams worldwide, making the 840AKV4-40 a trusted choice for motocross, road racing, supercross, and flat track applications.