I dont agree or disagree...
But usually rejetting a bike is dne when a component is changed ie bigger exaughst richer fuel ..........not the point...
If it ran fine and dosent know I assume a problem not a calibaration.
Try pulling your carby apart
Carby for illustration purposes only....
No need to be scared... Get a table a a clean towl.. Lotts a small parts and take it one step at a time and you will have no problems....
Reassemble and if dosent run well take to mechanic.....
Your problem sounds typically like fuel or at least when we have simillar problems at work its fuel....
Check the stupid things as well ...Fuel supply hoses.....You never know and its the simple ones that will shit you...