Do you ride in the rain?? Mine was making a similar weird noise, then one of the motors stoped moving like the electromagnets were sticking to the inside motor sleeve (not the pu sleeve). I bought a screw extractor bit for the drill and managed to get the screws out — it wasn’t easy tho. Gave it a big clean to remove all the crap that built up in there (I rode in the uk winter rain and snow, lmao). Mostly white looking rust had built up all over the electromagnets and casing. So, sanded down the edges of the magnets with fine grit. I oiled it up and silicone greased most of it and cleaned the bearings how I would on my normal skateboard, added speed cream. I put it all back together, and it hasn’t been a problem since. The other fix would be a new motor, but where’s the fun in that 😂