From my own understanding and measurements....your suffering from voltage sag (normal...how much depends on the cells in your battery) and your 'keep current' is way to low....when you set your max current in the BASIC menu, thats the absolute limit of current draw allowed into the motor, the 'keep current' is the programmed percentage of that limit, so if say, you have 20 amp set as your limit in the BASIC menu, 100% in the 'keep current' PAS menu will be the full 20 amps, 75% will be a maximum of 15 amps, 60% 12amps, 50% 10 amps etc.....its a safeguard measure... people get this mixed up with the current decay, which is valued at 1-8 (in the PAS menu)....this value will drop the amps going into the motor. Think of driving a car.....you accelerate up to a speed with your foot pressed down, then lift off when the speed you want is reached as you don't need as much power to maintain a constant speed. And although the BASIC tab and its 9 values look like your getting full power at level 9, your not, easily checked by looking at the wattage draw in your display. And as a side note, wattage draw into the motor is not equal to the wattage out at the wheel....but its the best we can get.