built a brand new truggy, but the there is noise metallic noise coming from the clutch bell and spur when I roll it on the ground. Tried to tighten, loosen the mesh, but it makes that sound regardless. No amount of shims for the clutch bell made any difference. The clutch bell spins very smooth. The gears seem ok, with no burrs, or any distortion. It does not make that sound when there is nothing meshed to the spur. Is there something wrong or that is just the way it is?
here's a vid for the sound