
Manufacturer's Ref: FXRS 50-51 ALOR — RFX Pro Series Armalite 520 Composite Sprocket, 51 teeth. Designed by RFX for the Quad, Cross, and Roadster environments, this double sprocket combines lightness and durability for demanding riders.
The machined 7075-T6 aluminum central body reduces unsprung weight, while the high carbon steel (HCS) outer ring ensures increased longevity of the teeth. The Hex-Drive technology between the inner and outer rings maximizes the transmission between the two parts and eliminates stress on the rivets. Optimized CAD profile and new mud evacuation grooves limit wear: everything has been designed for reliability in harsh conditions.
Installation: follow the manufacturer's disassembly/reassembly steps and torque specifications. Clean the hub, use blue Loctite on the bolts, and tighten evenly while maintaining the hexagonal interface. Suitable for standard 520 mounts — check compatibility with your motorcycle before installation.