Vortex 120A45 Rear Aluminum Sprocket Pitch Sprockets - CAT5 520 45-Tooth Silver

The Vortex 120A45 is a CAT5 series rear aluminum sprocket featuring a 520 pitch and 45-tooth count, finished in silver anodize. Designed as a direct OEM replacement or as part of a 520 conversion, this sprocket delivers significant weight savings over stock steel units, reducing rotating mass for improved throttle response and handling.

Key Features:

• CAT5 construction: CNC machined from specially formulated aerospace-grade aluminum alloy per Vortex specifications
• 100% CNC manufactured in the U.S.A. for precision fitment and consistent quality
• Saber tooth groove design: Unique tooth geometry increases sprocket longevity and improves chain engagement
• Anodized silver finish for corrosion resistance and a clean, race-ready appearance
• 520 pitch — compatible with 520 OEM applications or suitable 520 chain conversions
• 45 teeth — bolt-on gearing adjustment for acceleration or top-speed tuning
• Significantly lighter than OEM steel sprockets, reducing rotating mass for improved acceleration and handling

Vortex Racing has been manufacturing top-quality motorcycle racing components for Motocross, Supercross, Road Racing, Flat Track, and Minibikes for over 15 years. Each component is built to tight tolerances and tested with feedback from professional race teams worldwide.