I'm 6' 200#, wife 5'10" 160#, and then we suit up... I figure... ~400# all told by the time we're rolling - Never had a suspension problem riding 2up on day trips.
I'm sure things could be improved with some aftermarket parts and the help of someone that knows how to tune the suspension, but I'm not pushing anywhere near operational limits.
Biggest complaint from my wife is the pillion footpegs. I'm going to have to do something about moving them.
"Oh bother," sighed Pooh as he armed the photon torpedoes.