Vortex 525AZK-45 Black 45-Tooth 525-Pitch CAT5 Aluminum Rear Sprocket

The Vortex 525AZK-45 is a CAT5 aluminum rear sprocket designed for 525-pitch motorcycle drive chains. Built for riders who demand race-proven quality, this 45-tooth sprocket is manufactured by Vortex Racing — a U.S.-based company with a long track record of producing top-quality motorcycle racing components for Road Racing, Motocross, Supercross, Flat Track, and more.

Key Features:

• Chain Pitch: 525
• Tooth Count: 45 teeth
• Material: Lightweight CAT5 aluminum — specially formulated alloy per Vortex specifications
• Finish: Black anodized for corrosion resistance and a clean, aggressive look
• Construction: 100% CNC machined in the USA to extremely tight tolerances
• Tooth Design: Vortex patented tooth profile for improved chain engagement and extended sprocket life
• Self-cleaning mud grooves help prevent debris buildup during off-road or mixed-condition riding

The Vortex 525AZK-45 delivers the combination of lightweight performance and long service life expected from a race-developed sprocket. The CAT5 aluminum construction keeps rotating mass low while the hardcoat anodizing provides exceptional surface durability. Whether you're looking to restore stock gearing or fine-tune your bike's power delivery, this sprocket offers a direct bolt-on solution for 525-chain applications.