Bajaj Auto — service issue on my bike

Address:

Vijay Makwana, Mob No 9322512700, 401107

I am holdig bajaj v15 bike bearing no. Mh-04-hk-1502.
I had taken amc for bike servicing for the period ending till 16th aug 19.
I have taken last service under my amc contract on 7th aug 19.

After that my bike has started slowing down and i visited the service centre.
They opined that carborator must have stopped working needs to be replaced.

I doubt the same as my bike was running 100% perfect and i went only for normal servicing.

Till date no solution