At DMG Motorsports, we present the Vortex Standard Aluminum Rear Sprocket 39T-525 Silver (654-39) — the race-proven sprocket that has become the benchmark for performance-minded riders and professional teams alike. Built to deliver the perfect balance of light weight and strength, this Vortex sprocket is engineered to shed unwanted rotating mass without sacrificing durability, giving your Yamaha quicker acceleration and crisper throttle response. Whether you're chasing lap times on the track or simply want a premium upgrade over a stock steel sprocket, this Vortex Standard sprocket is trusted by champions across AMA Superbike and Motocross competition for its consistent, dependable performance.

Features:

• CNC machined from 7075 aluminum for amazing strength and light weight
• Unique tooth design engineered for smooth, efficient power transfer
• Manufactured to tight tolerances for a proven, race-ready fit
• Trusted by AMA Superbike and Motocross champions on and off road
• 39-tooth, 525-pitch design finished in silver for a clean, factory-style look
• Reduced rotating mass helps improve acceleration compared to heavier steel sprockets
• Designed as a direct fit for compatible Yamaha models