fuelling

Hi y'all, My 1993 900 Trophy is peeing me off mightily at the moment. I bought it 3 years ago, and immediately noticed there was a bit of a stumble between 5k & 6k rpm where it felt like there was either rubbish in the carbs or it was running out of fuel. Of course 5k-6k is where you find...

I've been fiddling with the riding modes and I have a question that's not answered by the manual or web site. Do the different Riding Modes have different fuel maps? I know the delivery of the power is altered. I take this to mean the speed at which changes made to the twist grip are applied...