Repairing electric scooter motor hub

My electric scooter broke. The motor seemed to not be working and everyone said it was a lost cause, simply a burnt out motor with no solution or way to fix it.

I thought differently so I opened it up and fixed it with the help of some WD-40. It has gone 20+ miles and 5 charging cycles to date with no issues. I will show my process here.

This embodies what we know WD-40 as, it can just fix things that seem unfixable.

Electric motors can break in a few ways, one of the ways is that something is rubbing or otherwise messed up on the inside (not electronically). This causes the motor to sill be able to try and output power even if it can't move or can move. In this case the electric motor was gunked up and was "stalling" in a way because excess copper powder from friction, molten glue from the overheating that happened on that day, and other stuff was stuck inside the motor.

LET THE MOTOR COOL DOWN AND DISCONNECT BATTERY.

Take apart the motor hub and identify what material is causing the issue. In my case it looks like friction and rust caused some metal to come off, which rubbed off other metal, which created a ton of metal dust. It also looks like I melted a silicone glue substance all over the motor hub from overheating.

Figure out the best method to remove the junk. I used compressed air and WD-40 to remove the metal dust (mostly rust) and help dissolve the weird glue bits.

Use WD-40 to help get out and wipe out everything using a cloth that doesn't leave lint or anything in the motor. I also used a stiff toothbrush to get stubborn bits. Make sure the whole thing is clean and that there is no particles in the motor you may have tracked in. Be careful around electrical components and sensors.

After than wipe out as much of the WD-40 and other stuff as you can. You can add some grease meant for this type of application if you want it to last longer.

Re-assemble.