Sadly, standard bikes are apparently more appealing in markets where motos are considered practical transportation on a daily basis, instead of weekend recreation vehicles. So, anywhere scooters are big standard bikes a big as well. Here in the States standards don't sell well because bigger is always promoted as better (false as that sometimes is). We all know there are great big bikes and small bikes, but American's seem to dwell on HP. Anyone who's ridden an RD400, SRX600, GS550, etc. knows you can have a ball on a small bike, and often the less HP you have the more you have to work the bike, which in turns is more fun to me. It's easy to drive a fast on fast vehicle over-engineered for the street (since it was intended for the track), and a much more exciting challenge to get up to speed on a smaller motor.
Case in point: my former literbike was too much fun and far too easy to launch the front on, or lose traction mid-corner due to sheer HP, so I moved back down the foodchain and got a 650 V-Strom to gain back some control. The WeeStrom is only marginally less fun, and substantially more controllable to ride -- takes me to 125 without blinking and tracks and handles nearly as well as my old sportbike -- and besides the cheaper insurance, I can hit the trails too.