I'm a little over 6,200 miles and am getting ready to do a 1,000 mile jaunt (or so) around part of Texas next week. My MGS original was getting smooth and flat in the middle so I went in to see about another tire. My service guy was PO at Michelin because his wife had run hers into the treads on a trip to CO and another in TX. As he said, "She isn't a small woman. She weighs about 200 and was carrying her camping gear," on her Piaggio 500 (not an MP3). I think she got just over 3,000 miles out of MGS.
He replaced her tire with a Metzler 150/70-14. He said it was recommended by the supplier because it is basically a sportbike tire but has a harder rubber down the middle (where you would be riding when cruising) and progressively softer rubber as moves out to the edges in a turn. Supposedly, this should give better wear while still handling well on the curves.
So his wife has about 1,500 miles on the new tire. It is showing no wear and she likes it so far. The service guy put one on his bike recently and I have one with about 10 miles on it at this moment. I will try to post the results but this may be an old thread by then. I weigh about 145 and guess I'm not that tough on tires. I can report, however, that my bike is running MUCH better with the new tire. I didn't realize how much difference it would make.
I don't know about the supplier's story. It sounded decent to me but I'm sure you guys know more about it than I do. I'd like to hear your comments.