RFX Pro Series HCS Steel - 520 SprocketRef : RFX01164A / 1123235003

Manufacturer Ref: FXRS 50-50 99ST

The RFX Pro Series HCS steel sprocket 520 is designed for riders looking to replace their transmission with a robust and reliable part. Made from high carbon steel, it offers excellent wear resistance and an optimized profile to minimize the added mass compared to a soft steel sprocket. The CNC laser cutting ensures tight tolerances and a precise fit on the hub, while the drainage grooves push away mud to reduce abrasion on the contact area and teeth.

• Material: HCS Steel (high carbon steel)
• Number of Teeth: 50 teeth
• Chain Pitch: 520
• Color: Silver
• Manufacturing: CNC laser cutting, CAD profile for lightweight
• Stiff design for better torsion resistance and tight tolerances

Universes: Quad, Cross, Roadster — compatible with models such as TRIUMPH TF 450-X, DUCATI DESMO 450 MX, or STARK FUTURE VARG EX (2026), depending on manufacturer compatibility.

Installation Tips (summary):

• Lift the rear and secure the machine.
• Remove the chain and wheel, then take off the worn sprocket.
• Clean the hub and check the condition of the holes and seals.
• Position the new sprocket, install clean bolts and nuts.
• Apply thread-locking adhesive such as Loctite on the threads and tighten in a cross pattern according to manufacturer recommendations.
• Reinstall the wheel and adjust the chain alignment/play according to the manual.

Robust replacement part for those seeking durability and precision without extravagance — a logical choice for off-road as well as road use.