First of all
typing, spelling, coherent sentences is your friend..........
As far as your issue- what gearing did it have before, vs what gearing does it have now?
So he pulled the carbs to see what jetting was in there?- and then decided that was good enough for the slip on and just synchronized them.........that is the story you are telling...
If that is the case, and jetting will hardly differ slip on to stock exhaust muffler- then all should be good on that front as long as the work was done correctly.
I would lean towards a gearing change is the culprit
typing, spelling, coherent sentences is your friend..........
As far as your issue- what gearing did it have before, vs what gearing does it have now?
So he pulled the carbs to see what jetting was in there?- and then decided that was good enough for the slip on and just synchronized them.........that is the story you are telling...
If that is the case, and jetting will hardly differ slip on to stock exhaust muffler- then all should be good on that front as long as the work was done correctly.
I would lean towards a gearing change is the culprit