Stator Current & RPM - Motorcycles
If you are asking about generated current, you are asking about a generator, not a motor. In this situation, I believe that you are talking about a magneto that is generating AC voltage in a stator coil. The generated frequency and voltage will be proportional to the engine speed. The current will be determined by the characteristics of the load, but would tend to be proportional to the voltage. If the power is used for loads other than the ignition system, such as charging a battery, there will be a rectifier to change the AC to DC and a voltage regulator to make the voltage constant.

Edit:
The current will tend to be proportional to the voltage only to an extent that increasing voltage with a given load will tend to increase the current. However some loads have characteristics that tend to maintain constant power. In that case, increasing the voltage may cause the current to decrease.