Especially noted when 2-up (ie an extra 400+lbs weight!). ...
Dayum...how'd you get a 400+!pound passenger in next to you?

thats the payload over the dry weight. Includes the portly driver! Hmmm could be 500lb then...
I knew what you meant, lol. But the way you wrote it, you were comparing "two up"... Extra 400 pounds, to how it performed empty. I was wondering how you experienced that phenomenon!😂