RFX Race 13 Teeth Gearbox output pinionRef : RFX00562A / 1123288003

Manufacturer Reference: FXFS 55-13 55ST — RFX Race Sprocket 13 teeth, designed for motocross and small displacement bikes.

This RFX Race front sprocket is CNC machined from high-strength alloy steel, carburized to achieve approximately 60 Rockwell to optimize longevity against wear of the teeth. Intended for 415 pitch transmissions, it features a standard 13-tooth design in silver finish. RFX works with tight tolerances to ensure precise engagement and consistent wear of the chain and sprocket.

• Material: carburized alloy steel
• Number of teeth: 13 (front sprocket)
• Chain pitch: 415
• Color: silver
• Version: standard, CNC machining
• Note: some RFX models are equipped with lightening holes to reduce unsprung mass.

Designed for motocross and compatible with small KTM 50 models (e.g., 50 SX PRO JUNIOR LC, 50 SX MINI ADVENTURE GS, 50 SX - model year 2008), this sprocket allows you to adjust the gearing according to your traction or engine speed needs. A precision wear part, it integrates directly onto standard shafts and is aimed at demanding riders seeking reliability and consistent engagement.