RFX Pro Series HCS Steel - 520 SprocketRef : RFX00380A / 1123232001

RFX Pro Series HCS 520 Sprocket — FXRS 40-48 99ST

Designed for demanding riders who want a robust and durable sprocket without sacrificing weight, the RFX Pro Series made of high-carbon steel combines strength and precision. Its HCS material offers excellent wear properties and allows for an optimized profile, minimizing the mass gap compared to an aluminum sprocket while maintaining the necessary mechanical strength on muddy or rocky terrain. The CNC laser cutting and CAD design ensure precise machining and tight tolerances for consistent transmission behavior.

Features:

• Brand: RFX — Pro Series HCS
• Material: high-carbon steel
• Color: silver
• Number of teeth: 48
• Chain pitch: 520
• CNC laser cutting and CAD profile to lighten the part
• Mud evacuation grooves to reduce wear
• Stiff design improving torsional resistance and tight tolerances

Installation instructions:

• Lift the motorcycle on a workshop stand, rear wheel free.
• Remove the chain and then the rear wheel.
• Loosen and remove the nuts while holding the hex key.
• Clean the hub before positioning the new sprocket and check the alignment of the holes.
• Clean and apply Loctite (blue) on the bolts, hand-tighten, then evenly tighten to the torque recommended by the manufacturer.
• Reinstall the wheel, adjust the alignment and chain tension according to the manual.

Suitable for Cross and Roadster practices, this RFX sprocket is a reliable choice to replace an original part on demanding trails and off-road machines.