How do your plugs look? If it's a rich-running issue they should be black and fluffy, I would also imagine the bike would be running fairly rough.
Have you checked your air filter? Even the K&N can become plugged, again I would imagine you'd be able to discern a loss of power if this were the case.
Have you checked your throttle body boots? Contrary to what you might think when one blow loose it will give you a rich condition.
I'm guessing there're no visible fuel leaks? Check the quick connects under the tank, while I wouldn't expect it perhaps there is a seal leaking.
That's all I've got.
Go hang a salami I'm a lasagna hog