RFX Pro Series Elite Aluminium - 428 SprocketRef : RFX00437A / 1123237023

Designed for motocross riders who demand reliability, the RFX Pro Series Elite sprocket combines lightweight construction with robustness. CNC machined from 7075 aluminum, it features an optimized CAD profile and a durable blue anodization that makes visual maintenance of the final drive easier. With its 51 teeth and 428 chain pitch, it is aimed at small displacement bikes that require performance on soft and muddy terrain.

• Laser-engraved RFX logo for a polished finish.
• CNC machined 7075 aluminum: a balance of weight and strength.
• Mud evacuation grooves to limit accumulation and chain wear.
• Model-specific color coding and blue anodized finish.
• Lightweight CAD profile while maintaining a rigid design for better torsional strength.
• Reduced manufacturing tolerances for precise chain engagement.

Ideal for motocross use, this sprocket naturally fits modern 85cc bikes — among the common applications: KTM 85 SX, Husqvarna TC 85, and GASGAS MC 85 (2025 references indicated). Installed as a standard replacement, it is suitable for riders looking for a durable, clean, and off-road-ready final drive.

Manufacturer reference: FXRS 51-51 99BU