Vortex CK4239 V3 520 Chain and Sprocket Kit 16T Front 40T Rear

The Vortex CK4239 is a complete V3 520 chain and sprocket kit that includes a 16-tooth front sprocket, 40-tooth rear sprocket, and a premium 520-pitch Performance Links chain — everything needed for a full drivetrain replacement in one convenient package.

Vortex's V3 kit line is engineered to retain stock gearing and chain pitch, making installation straightforward with no cutting or chain modification required. The front sprocket is manufactured from high-carbon steel with a nickel-plated finish and drilled holes to reduce rotating mass. The rear sprocket is laser-cut carbon steel with an electroplated black finish for corrosion resistance and durability. The included 520-pitch chain is made in Japan to stringent quality specifications and features drilled side plates for reduced weight.

Kit Contents:

• 1x 520-pitch Vortex Performance Links chain
• 1x 16-tooth steel front (countershaft) sprocket
• 1x 40-tooth steel rear sprocket
• 1x Rivet-type master link

Key Features:

• 520 chain pitch — lightweight and performance-optimized
• High-carbon steel sprockets — nickel-plated front, electroplated black rear
• Drilled sprocket and chain links — minimize rotating mass for improved response
• Ready-to-install — no chain cutting or modification required
• Complete kit — front sprocket, rear sprocket, chain, and master link included

The Vortex CK4239 is an excellent OEM replacement drivetrain kit offering a strong balance of performance, longevity, and value over factory components.