I had a Honda XL350.
Its acceleration was sluggish beyond 50 mph. I got it up to 90 mph once though (and got pulled over by the Highway Patrol). It's not really suitable for taking a passenger on the freeway (although I did that too).
It would "slide" on the rain grooves. It might have been better if I'd had street tires on it instead of dual-sport semi-knobbies, though.
I imagine the 'zuke bike would be similar.
