Vortex 438KV4-42 VTX Aluminum Rear Sprocket Chain Sprockets - 42T 520

The Vortex 438KV4-42 is a lightweight VTX Series aluminum rear sprocket featuring a 42-tooth count designed for 520 chain applications. Vortex sprockets are precision-machined from high-grade aluminum alloy and hard anodized for enhanced durability and corrosion resistance, making them a popular performance upgrade over heavier OEM steel sprockets.

Key Features:

• 42-Tooth rear sprocket for 520 chain pitch
• Precision-machined from lightweight aluminum alloy for reduced unsprung weight
• Hard anodized finish for corrosion resistance and long service life
• CNC-machined for tight tolerances and consistent chain engagement
• Part of Vortex's VTX Series — a direct OEM replacement with performance benefits
• Significantly lighter than stock steel sprockets, improving throttle response and acceleration

Vortex is a trusted name in motorcycle drivetrain components, and the 438KV4-42 delivers the precision and reliability that racers and street riders demand. Compatible with the KV4 carrier/hub pattern — verify fitment via tooth count, chain pitch, and bolt pattern before ordering.