RFX Pro Series Elite Aluminum Sprocket - 415 (Manufacturer part number: FXRS 57-43 99BU): a sprocket dedicated to motocross, designed for riders seeking reliability and lightness on muddy trails. CNC machined from 7075 aluminum, it features an optimized CAD profile, tight tolerances, and a rigid design to minimize torsion under load.
- Number of teeth: 43 (chain pitch 415).
- Material: 7075 aluminum, anodized in blue.
- Mud drainage grooves to extend the lifespan of the chain and sprocket.
- Laser-engraved RFX logo and color code suitable for models.
- CNC machining and CAD profile for a good balance of strength/weight.
Designed for motocross bikes, this RFX sprocket replaces the original parts on compatible models. Check the chain pitch and mounting diameter before installation. Common mounting examples: KTM 50 SX (2025), HUSQVARNA TC 50 (2025), and GAS GAS MC 50 (2025).
Ideal for off-road terrain, it combines a racing look (colored anodization) with technical features suited to off-road constraints — a robust option for those looking to replace their sprocket without compromising weight or longevity.
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