Well here is a topic that I actually have prior knowledge, so please allow me to throw my 2 cents in.
My 2002 Yamaha Warrior comes stock with a 200. If you know the warrior then you know that it is built for cornering, in the cruiser world. I ruined the outsides of a pair of boots at the Dragon and had a blast doing it.
Now when I did my engine upgrades I found that I was ripping through tires in less than 3000 miles without burnouts. It wasn't due to the 107 Hp but more due to the 127 ft lbs of torque. Of course the only part of the tire that was worn was the center contact patch. Basically I had about an inch and a half worn down to the belt. So at the advice of friends from another forum I upgraded to a 240 back wheel and tire. This was to increase the life of the tire by improving the size of the contact patch width.
Here is what I learned;
Yes there is a loss of Hp. More so with mine because the wheel and tire were bigger = more weighted mass to turn.
No there was no real handling difference on that bike
. I had trusted friends who had stock warriors swap with me and they said only at first could you tell the difference.
Yes it improved the life of the tire. I now get more than 5000 miles on a tire which is better then I got when the bike was all stock. In fact I went with a Conti Race attack tire because it was more sticky.
Now what will the tire do for this bike? Probably not too much. Like the warrior, this bike handles beautifully so you will probably not notice too much there. You will lose a little Hp due to the weight of the tire, more so if you get a wider rim. You might find that by going with a wider tire on the stock rim you actually reduce the contact patch and reduce the life of the tire. That was another lesson learned with the warrior. IMPO you would have to look way up her skirt to see that there is a wider tire in there.
So will it fit? From what DD says it doesn't sound like it.
I personally would only put a wider tire on if I were to do major Hp upgrades and I promised myself that I wouldn't do that.
But it is your bike so if you do it, just make sure you post pictures so we can gawk at them.
I'll shut up now....