You didn't say what type of motor. If an electric motor it could be the shaft bearing(s) are worn.
its the motor
the motor will continue to operate at a reduced speed and experience vibrations
replace it
Seafoam Motor Treatment.
Depends on why it is noisy.
Yes, you need a license to operate a motor vehicle.
Yes, you need a license to legally operate a motor vehicle.
Noisy operation of a motor is usually caused by the motor's bearings. Use an instrument that can check the temperature of the bearings. If they are hotter than the surrounding temperature of the motor's frame then change them out for new ones. New bearings should quiet the motor.
Good battery,slow cranking speed ,noisy,
They will be noisy and wear very fast.
Yes, in most places, you need to have a driver's license to legally operate a motor vehicle.
Yes, you need a valid driver's license to operate a motor vehicle in most states.