Yes, it will fit. BUT, some tires dont measure the same. I have seen certain 190's fit without problems and other rub on the belt guard. Thats was fixed with a little filing of the guard, no big deal.
It will how ever change the handling a little if you are into the twisties quite a bit. The Buell wheels are simply not meant for anything bigger than 180's. In fact, alot of the sportbike racers prefer tires as small as 160. 190 on the Buell wheel changes the shape of the tire that was meant for the tire. It tends to tuck the outside edges of the tire to the point that they become sometimes useless and dangerous to ride the outside of the tire. Just be careful if you go bigger, I wanted to myself but after researching it more changed my mind. I do think it looks sick though, I love meats on the rear.