RFX Pro Series Elite Aluminum Sprocket - 520 (Manufacturer part number: FXRS 20-50 99GN) — a sprocket designed for motocross, built to withstand muddy conditions and the demands of the terrain. CNC machined from 7075 aluminum, it features an optimized CAD profile to reduce weight while maintaining high rigidity, limiting torsion under load and promoting a crisp response from the drivetrain.

The green anodized finish and laser-etched RFX logo provide a sleek and durable look. Integrated mud evacuation grooves facilitate self-cleaning and help extend the lifespan of the chain and sprocket during winter rides or in heavy terrain.

• Material: CNC machined 7075 aluminum
• Chain pitch: 520
• Number of teeth: 50
• Finish: Green anodized, laser-etched logo
• Design: CAD profile, mud grooves, tight tolerances

Compatible with many motocross models — including KAWASAKI KX 450 X (2026), KX 250 X (2026), and KX 250 (2026). Ideal for riders looking for a lightweight, precise, and easily maintainable sprocket after each ride.