At DMG Motorsports, we present the Vortex F5 Rear Sprocket (840AK-49) — a 49-tooth, 520-pitch aluminum rear sprocket engineered for riders who demand race-proven durability without the extra weight of a stock steel sprocket. Finished in Vortex's signature black hardcoat, this sprocket is built specifically to fit select Yamaha applications and is a favorite among racers looking to shed unsprung rotating mass for sharper acceleration and handling. Backed by decades of track-tested performance, the Vortex F5 line has earned its reputation as a trusted upgrade for serious riders.

Features:

• CNC machined from 7075 aluminum for amazing strength and light weight
• Hard anodized with a jet black dye for a durable, race-inspired finish
• PTFE coated over the hardcoat for added lubricity, wear resistance, and longer-lasting durability
• Unique tooth design engineered to increase sprocket longevity
• 100% CNC-manufactured in the USA to tight tolerances for a precise, reliable fit
• 49-tooth, 520-pitch configuration designed for Yamaha applications
• Lightweight aluminum construction reduces rotating mass compared to OEM steel sprockets
• Trusted by champions across Motocross, Supercross, and Road Racing competition