At DMG Motorsports, we present the Vortex Rear F5 Sprocket in Aluminum, 41T-525, Black Hard Coat for Yamaha (642K-41) — a race-proven drivetrain upgrade designed to shave rotating mass while delivering the strength and precision serious riders demand. Vortex has built its reputation supplying sprockets to championship-winning teams, and this F5 sprocket brings that same track-tested engineering to your bike. Machined from premium 7075 aluminum and finished in a stealthy jet-black hard anodized coating, this sprocket isn't just built to perform — it's built to look the part on the grid or the street.

Features:

• CNC machined from 7075 aluminum for amazing strength and light weight
• Hard anodized with a jet black dye for a sharp, durable finish
• PTFE coated for added lubricity and long-term durability
• Unique tooth design engineered for smoother power transfer and extended sprocket life
• Trusted by champions across professional and club racing paddocks
• 41-tooth count built for use with 525-pitch chains
• Reduced rotating mass compared to steel sprockets helps improve acceleration and deceleration
• Designed to fit Yamaha applications specified for the 642K-41 part number