At DMG Motorsports, we present the Vortex CAT5 Rear Sprocket 40T-520 in Black Aluminum (P/N 452AZK-40) — a lightweight, race-bred rear sprocket built for Kawasaki platforms that demand precision and reduced rotating mass. Vortex has long been a favorite among racers and trackday riders looking to shed weight at the wheel while gaining a distinctive, high-end look. This sprocket is part of Vortex's renowned CAT5 lineup, prized for its tight manufacturing tolerances and signature two-tone finish that stands out from stock steel sprockets.

Every CAT5 sprocket in this series is anodized in color first, then CNC machined from premium 7075 aluminum, which cuts through the color coating on the sweeps, mud grooves, and teeth to reveal bright silver highlights against the black anodized finish — giving the wheel a genuinely trick, race-inspired appearance rather than a simple painted or dipped look. Beyond aesthetics, the sprocket's design has been proven at the track: racing champions rely on the CAT5's proven design for its tight tolerances and unique tooth geometry, which is engineered to increase sprocket longevity and improve power transfer to the rear wheel.

Built specifically to fit 520-pitch Kawasaki chains and configured with 40 teeth, this sprocket is a direct-fit upgrade for riders replacing worn OEM steel sprockets or dialing in gearing changes for the street or track. Choose DMG Motorsports for genuine Vortex performance parts backed by our commitment to fast shipping and reliable service.

Features:

• Anodized in color first, then CNC machined from 7075 aluminum for a trick two-tone finish with bright silver highlights
• Black anodized finish with contrasting silver machine-cut accents on sweeps, mud grooves, and teeth
• Unique tooth design engineered to increase sprocket longevity and improve power transfer
• Proven CAT5 design trusted by racing champions for its tight manufacturing tolerances
• Lightweight aluminum construction reduces rotating mass versus heavier OEM steel sprockets
• 40-tooth, 520-pitch configuration designed to fit Kawasaki models using this sprocket spec
• Vortex patented sprocket design unlike any other on the market

Fitment