RFX Pro Series HCS Steel - 520 SprocketRef : RFX00283A / 1123217003

RFX Pro Series HCS Steel Sprocket - 520 (Manufacturer Ref: FXRS 10-50 99ST)

Designed for motocross and enduro use, this RFX Pro Series sprocket made from high carbon steel (HCS) offers superior durability and a refined finish. With its 50 teeth and 520 pitch, it is aimed at riders looking for a robust, precision-machined part that can withstand the muddy and demanding conditions of off-road terrains.

• Material: certified high carbon steel — increased wear resistance
• Number of teeth: 50 (520 pitch)
• CNC laser cut for precise tooth profile and tight tolerances
• CAD-optimized profile to limit excess weight compared to aluminum
• Mud evacuation grooves to reduce buildup and wear
• Stiff design for better torsional resistance
• Color: silver, raw finish suitable for off-road use

The laser cutting and controlled tolerances ensure proper chain/sprocket alignment, which is important for the longevity of the drivetrain. Ideal for 520 setups on motocross bikes (e.g., CRF 450), this sprocket is a reliable option for those looking to minimize frequent maintenance without sacrificing strength.

Installation (summary): lift the bike, remove the wheel and chain, disassemble the worn sprocket, clean the hub, position the new sprocket, apply suitable Loctite on the bolts and tighten evenly according to manufacturer torque specifications, reposition the wheel and check chain alignment and tension.