Maybe I can give some further details and tip off any problems that you guys may have in mind. It all started at school when I was riding back home, I was taking it easy and out of no where the exhaust note dropped - sounded like a damn Harley - and it felt like I lost a couple cylinders. And has been running like crap since. When this happened I heard no weird noises coming from the engine.
The Kawi dealer is far from where I live so I took it to Honda Performance and they ran a full diagnostic and said that they found no problems with it at all - that's where they said it could be running in 'limp mode' from the exhaust making it run too rich.
Of course, I changed the plugs and filter, but still no change in how the bike is running.
Another thing is that around 6-8k rpms the exhaust note sounds a lot different - almost like its struggling - but does not buck or hesitate. This range (6-8k) is where the power loss is most evident.