Manufacturer's ref: FXRS 61-51 ALRD
The RFX Pro Series Armalite 520 composite sprocket combines lightweight design and durability for motocross use. Designed and tested by world and British championship racing teams, it features a machined inner ring made of 7075-T6 aluminum and an outer ring made of high carbon density HCS steel. The result: a 51-tooth sprocket with a CAD-optimized profile, mounted on a hub with Hex-Drive interface for reliable transmission between the two rings without stressing the rivets.

• Type: Armalite double composite sprocket – pitch 520
• Materials: Inner ring aluminum 7075-T6 (CNC) / Outer ring HCS steel
• Teeth: 51
• Color: Anodized red
• Features: lightweight CAD profile, mud evacuation grooves, rigid design to limit torsion

Installation: follow the manufacturer's assembly steps and torque specifications. Clean the hub and fasteners, apply appropriate thread-locking compound to the bolts, and check the alignment and chain tension after reassembly.

Recommended use: ideal for competition and training in motocross. Compatibility confirmed for certain Beta RR 2023 models (RR 430 4T Racing, RR 430 4T, RR 390 4T Racing).