You can change throttle response electrically, by padding.
Adding resistance from wiper to low side will reduce the action on the first part of throttle and move it to the top.
The number on the positive log side, bottom, is percentage of throttle pot.
If pot is 10k connect 2.5k or 1k from wiper to B-.
I did that to mine to make a high voltage conversion more drivable.
I also added a small resistor, like 500 ohm in series with the +5 lead to take a little of the top.