At DMG Motorsports, we present the Vortex CAT5 Rear Sprocket in Aluminum, 48-Tooth, 530 pitch, finished in Black for Yamaha applications (part #840ZK-48) — a race-proven drivetrain upgrade built for riders who demand less rotating mass and more precise power delivery. Vortex sprockets are a fixture in paddocks and pit lanes for good reason: they combine a distinctive manufacturing process with a design pedigree that's been refined through years of competition. This CAT5 sprocket is anodized first and then CNC machined from 7075 aluminum, a process that leaves behind sharp silver highlights against the black finish for a look that's as functional as it is aggressive. Whether you're chasing lap times or simply want a lighter, better-looking replacement for your OEM steel sprocket, this Vortex CAT5 unit is ready to bolt on and perform.

Features:

• Anodized FIRST, then CNC machined from 7075 aluminum for a durable, lightweight construction
• Two-tone finish: black anodized body with contrasting silver machine-cut highlights
• Unique tooth design engineered to increase sprocket longevity and improve power transfer
• Vortex's patented CAT5 sprocket geometry, unlike any other sprocket on the market
• 48-tooth, 530 pitch configuration designed to fit specific Yamaha models
• Trusted by champions and widely used in professional roadracing paddocks
• Lightweight aluminum construction reduces rotating mass versus heavier OEM steel sprockets