Other than that if the Voltage and Watts rating are not on the motor then I do not know of any way to find out what they are.
Oh one thing I just thought of is to look at the controller and see if it has a Watts rating printed on a sticker on it.
If still no luck then maybe insert a photo of the ebike here and see if anyone else knows what make and model it is.
Please let us know how it goes.
ziz hin
I am not very informed on the subject,I would hope to find some help
on how to understand the wattage of an unknown
motor I have on my ebike.
I bought it second hand and there is no information about it written
on the motor itself as it often is written on other motors.
thanks