Battery Toy/Kids Car - Repair

Welcome
In this video I am repairing a toy car. The vehicle was outside for several years. The gearbox was damaged and the motor windings burnt. The gear was made on a 3D printer made of PET-G material. The motor winding has been changed and new brushes have been installed. The running-in of the brushes was made in distilled water, thanks to which the brushes run in faster and there is no risk of overheating the engine. Finally, I feel that the vehicle has too little power, so I did not buy a new 6V battery. I am thinking of installing a 12V and two motors.