Hero Motocorp — hero destini 125: frequent intermittent jerking while driving. throttle power also fluctuating.

I did my servicing on time. Last 7th july 2020, my last free servicing was done. Today is 30th sept 2020. Not even 3 months, i am facing engine & transmission issue. I dont know how the servicing was done. I did not met any accident. Even there is no scratch on the vehicle. During this lock down period, the odo value is also minimal (Only around 460km after last servicing).

As soon as free service got over, problem is starting up.

I had activa earlier. It was good. Atleast these kind of issue did not experience.

Kindly help me in this regard