At DMG Motorsports, we present the Vortex Steel Rear Sprocket 43T-520 Black (642AS-43) — a precision-engineered replacement sprocket built for compatible Yamaha models running 520-pitch chain. Vortex has spent years refining its racing components, and this rear sprocket carries that same commitment to quality, tight tolerances, and long service life. Whether you're restoring stock gearing or dialing in your setup after a chain swap, this sprocket delivers the strength and smooth chain engagement riders expect from the Vortex name.

Features:

• High tensile carbon steel construction for maximum strength and durability
• Precision CNC machined individually to achieve the tightest tolerances
• Ideal Tooth Design™ engineered for perfect chain hold and smooth release
• Electro-plated satin black finish that helps resist corrosion
• Hardened teeth built to withstand many miles without sacrificing strength
• 43-tooth count designed for 520 pitch chain applications
• Purpose-built fitment for compatible Yamaha motorcycles
• Maximum wear resistance for extended sprocket life

Fitment