Dyno is always a good idea both to extend longevity and gain power. I am not sure with an EFI bike but I know a properly set up bike with open pipes and intake should sort of pop on decel if jetted correctly. Not loud backfire or eccessive popping but a sort of rumble.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!