RFX Pro 13 Teeth Gearbox output pinionRef : RFX01188A / 1123253001

RFX Pro Sprocket 13 Teeth — front sprocket machined for 520 transmission, designed for demanding riders in motocross, quad, and roadster. Made from high-strength steel, this Pro Series sprocket is CNC machined and carburized to achieve a high surface hardness (≈60 HRC), enhancing its wear resistance in intensive use.

The Anti-Mud version features drainage grooves on both sides and lightweight holes where necessary, limiting dirt accumulation and facilitating cleaning after a muddy ride. The black zinc finish protects against superficial corrosion from washing and provides a neat look to the front end.

• Brand: RFX
• Number of Teeth: 13 (sprocket)
• Chain Pitch: 520
• Material: high-strength steel
• Machining: CNC
• Treatment: carburizing (≈60 HRC)
• Version: Anti-Mud with self-cleaning grooves
• Finish: black zinc

Manufacturer reference: FXFS 11-13 99BK. Compatible with a wide range of off-road and road machines — including models such as HONDA CRF 450 RX ENDURO, HM CRE-F 500 X, or HONDA CRF 450 RWE — for riders who want a robust and polished part on their front transmission.