I can't really address your questions through personal experience. But, I can tell you, I considered a wider front tire on mine and posted the question on another forum. Didn't get much response.
Some feedback I did get was that it is popular in Europe. Handling sucks in comparison to stock. Some guys that have done it, changed it back to stock due to handling problems.
That's about all I got other than a little guff. Don't know about what mods would need to be done. I think Avon makes a 150 front tire but I haven't confirmed it. Good luck.
If you go fat in the front, post some pics, I'd like to see em!
