I am using Honda city Vario 2006 on CNG, there is issue i.e. when i start the engine in morning and put in D, the car RPM gets unstable and drops below 1000 and then comes to normal same happens in when gear is put on R, but it becomes stable when the engine heats up, also when i stop the vehicle on a signal or i just apply emergency breaks, i feel a jerk, like car is changing gear from 2nd to 1st, i mean to say i feel like car is changing gears at once.
i want to know what is the problem, also plz suggest me a good mechanic at islamabad, is it an issue with the transmission or some other issue.