RFX Pro Series Elite Aluminum Sprocket - 520 (Manufacturer part number: FXRS 20-48 99BK) — A sprocket dedicated to motocross, designed to withstand muddy conditions and the demands of off-road sessions. Precisely machined, it is aimed at riders looking for a lightweight and reliable part for their 520 transmission.
- Material: CNC machined 7075 aluminum for an excellent stiffness-to-weight ratio.
- Number of teeth: 48 teeth (CAD optimized profile).
- Chain pitch: 520, compatible with standard motocross drivetrains.
- Finish: black anodized with laser-etched RFX logo; color coding available by brand.
- Design: mud evacuation grooves to limit accumulation and extend the lifespan of the chain and sprocket.
- Tight tolerances: precision machining for consistent fit and better performance in harsh conditions.
Designed for the terrain, this Pro Series Elite sprocket offers a rigid construction to reduce deformation under load while remaining lightweight. Directly replaces original 48-tooth sprockets in 520. Main compatibilities: KAWASAKI KX 450 X (2026), KAWASAKI KX 250 X (2026), and KAWASAKI KX 250 (2026). Check the pitch and number of teeth before installation.
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