Welcome to the forum.
I can't give you a direct answer but the stock 190 tire is right at 7.5 inches at the widest part of the sidewall whereas the 240 is almost 9.5 inches wide. Do you have more than an inch on each side (probably need at least 1 1/4") between your existing tire and the swing arm?
I know they run 200s all the time, but they are only about 7.9" wide.
Another factor is that your stock rim is not wide enough to provide a decent tire shape. The good thing is you will have chicken strips forever.