On my 2005 model, the wife and I (350lbs) plus camping gear did numerous trips through mountainous country and had no problems blasting right along ahead of traffic. The wife would fall asleep on it she was so comfy. If 2up riding with luggage was why I purchased the bike, I would consider going larger on the motor but that is only becuase I like speeding. I bought a few bikes and scooters since that one but now I just bought a 2012 model so I clearly have no doubts of its capabillty.
The beaten path is for beaten people