
RFX Pro Series Elite Aluminum Sprocket - 415 (Manufacturer Part No: FXRS 57-42 99RD) — a sprocket designed for motocross runs where weight and chain precision matter. CNC machined from 7075 aluminum, it features an optimized CAD profile and brand-coded red anodization for a race look on your motorcycle.
This Pro Series Elite sprocket combines quality machining and a design tailored for off-road use: the rigid construction aims to enhance torsional resistance without sacrificing weight savings. It is available in colors that match motocross frames and can replace the original sprocket on many 50cc models.
Common compatibilities: KTM 50 SX (2025), HUSQVARNA TC 50 (2025), GAS GAS MC 50 (2025). Check the pitch and number of teeth of your transmission before installation.