What brand of car chassis your use? What original ESC you are using?
I even don't know what problem you mension, how can we answer you?
What we can answer is a general answer, may be not fit your case.
Please specify what you have (the brand, the type etc). Only people who know how to ask can get good answer.
Bad question will only get bad or wrong answer, OK.
o. thanks for your reply..
actually my car is TT-01 Tamiya..with the original motor...
The suggestions in the instruction menu...
is changed into the tamiya RS - 540 sport - tuned motor
and becuase 電變 is the original tamiya ones..
receiver that I am using is the FR - R122JE (Futaba)
So I would like to change to some faster motor...
but some post said that Original 電變 cannot with the 23T motor
so I would like to know any choices?