About Dual Motor problem

I have a set servo1 left throttle, servo3 right throttle

and My firmware is Rover 4.0.0

i tried throttle 100%

sometimes they is working but not same pwm range.

so i want to solve this problem. if you can this problem, can you tell me about solution?

This excellent new video from @rmackay9 will be a good starting point. Once you perform the steps described there, adjust the max and min values on the servo outputs page to get the left and right motors operating at equal speed (doesn’t have to be perfect) for the same throttle. You can get some idea of what I mean from this video: https://youtu.be/IepGuPBgusU