I've got too many- surprise, surprise!
The GoldWing is a pig and even hypermiled and modded like a fiend I don't see it breaking the 50's. As it is, it's solidly in the 30's- my car does better. Lots of built-in inefficiencies in this unit.
The SilverWing is less of a pig, usually good for upper 40's, maybe lower 50's if all goes well. It might respond to aero work a bit but it's impractical to regear (shaft drive) and it's heavy for it's size. No 100 Club in this thing's future.
The V-Max... fuel economy? What's that? This thing is for peeling my eyelids back and giving me blurry tunnel vision. I love it.