[BusyWeb]

Hi, Pete.
If you don't do much highway touring, you may look at the dual sports bikes.
Those types are little bit lighter than street oriented bikes, but with bigger engine size, more power.
Many do start 250cc to 650 cc sizes, and saw some 400-450 size super-moto style which tires are street oriented types.
Riding position is mostly up-right, and wide handle bars.

You are looking for the crousier type or strictly street type, I don't think (not sure) that you can have less than 400 lb weight.
Just my opinion!!