At DMG Motorsports, we present the Vortex F5 Rear Sprocket 43T-520 Black Hardcoat for Yamaha (642AK-43) — a race-bred, lightweight replacement built to shed rotating mass and sharpen acceleration without sacrificing durability. Vortex has built its reputation supplying components to championship-winning teams, and this F5 sprocket brings that same track-tested engineering to your street or race bike. Each sprocket is machined from 7075 T6 aluminum to a very high tolerance, then finished with a hard anodized jet black dye for a striking, durable look. The F5 Hardcoat is applied after the sprocket is cut, allowing the PTFE coating to sit directly on the sprocket's teeth, where it offers a much lower coefficient of friction than raw aluminum while also resisting wear and heat, giving the sprocket a longer lifespan and less drivetrain friction loss. The aluminum construction makes it much lighter compared to an OEM steel sprocket, leading to reduced rotating mass and allowing for improved acceleration and handling. Backed by Vortex's patented, unique tooth design engineered to increase sprocket longevity, this 43-tooth, 520-pitch sprocket is a proven upgrade for riders who demand performance and reliability from every component on their machine.

Features:

• CNC machined from 7075 aluminum for exceptional strength and light weight
• Hard anodized with a jet black dye for a durable, sharp finish
• PTFE hardcoat applied directly to the teeth for added lubricity, wear resistance, and durability
• Unique, patented Vortex tooth design increases sprocket longevity
• Lighter than OEM steel sprockets, reducing rotating mass for improved acceleration and handling
• 43-tooth, 520-pitch configuration designed to fit Yamaha applications
• Trusted by champions and race teams for proven on-track performance