I used a Golden Motor
I think they were a little cheaper when I bought mine than they are now.
I would put my bike in lowest gear to pull away from a stop, pedal about two full turns, then put it in highest gear and start to pedal and hit the throttle all the way up.
Doing this seemed to minimize the amps to pull away from a stop.
I could go from a stop to 20 MPH in about 5 seconds.
Acceleration is not a problem. Besides, what's the big rush? You are on a bike, enjoy it!