I looked at a Metro last year, after my QT got stolen, but I don't remember much about it, except that it's 4 stroke.
Does it have a variator trans, or a multi-speed trans? If it's got a variator, that's something you can mod or unrestrict without too much trouble.
Another 4 stroke bike I looked at had a 4 speed auto trans:
BTW, these guys have never returned any of my emails regarding parts or their bikes for sale, so I'm not too sure I can trust them... I'm not crazy about the slow crappy midi that loads up every time, either.