I wonder if such a bike exists. It weighs under 400 pounds. It has an engine between 250cc and 500cc. It has a range of 250 miles per tank. Like a big cruiser, it has a fairing, either built-in, after-market, or DIY. It is comfortable for a long legged person to ride all day on back roads and for a little while on the highway.
I already have a super scooter, a 2003 Aprilia Atlantic 500. It’s great. It’s close to what I want. It weighs over 425 pounds wet and that’s just a little too heavy for me sometimes.