There is a multitude of things that happen when you change your tire size like this. First, you do change how stepe the tire is, and why? Because it want meant to be on the bikes stock wheel. This does not make the bike more stable either, the quick pitch can create problems..think of it as a roof, if it snows and the roof has a stepe pitch the snow will slide easier than with a less stepe. This is the same with a tire. Alot of the GP racers prefer a narrower tire do to the fact that they are a more stable and faster turning tire.
If you like the look of a wider tire... thats cool, I do too. BUT, you will sacrifice handling. My advice is to keep your correct tire and look at your suspension settings as far as getting the bike over...Thats were it really begins after riding tech. You can set it so all the bike wants to do is lay down on turns...trust me. Thaloc showed me a site a while back to set up your suspension and it works almost too good.
But again, as far as the tire things goes, just Google it (something like -Motorcyle tire size and handling), you'll see what the pros say.
