I am blessed to have a Gold Wing for the freeway, but the KLX or my CB175 is a better lightweight all around commuter. The 60-70+ MPG doesn't hurt either. :wink:
Something like an XT660 or KLR650 or Husqvarna Terra are fine freeway bikes. 8)
I will ride the KLX or the YZF on the freeway short distances, 20 miles or so. Both are capable of 85+ MPH but while that is unpleasant on the KLX, let me tell you it's miserable on the YZF
Never ride a 200cc bike on the freeway. 8O