
RFX Race Sprocket 13 Teeth (manufacturer part number: FXFS 82-13 55ST): a front sprocket designed for motocross riders seeking reliable and precise transmission. CNC machined from high-strength alloy steel and then carburized (claimed hardness), this sprocket offers a clean cut finish and tight tolerances for good chain engagement and controlled wear. Its silver hue gives it a sleek and technical look on the wheel output.
Designed for a chain pitch of 520, this 13-tooth sprocket in standard version allows for adjustments to engine character for sharper starts and increased torque at low RPM — ideal for rough terrain or strong acceleration on enduro/motocross courses.
Compatible with several Cross models, it notably fits the Sherco 450 SEF‑R Factory (2023), 300 SE‑R Factory (2023), and 250 SE‑R Factory (2023). Replace your original sprocket to regain a sharp and reliable transmission feel. Check the bore count and compatibility with your machine before installation.