Then here it is. I ride a 990 Adv. Haven't done tons of 2-up rides (maybe 500 miles on pavement and 100 dirt) I was always happy and comfortable. At a point that I kind of like 2-up better on pavement. Bike feels and is heavier and more stable. No problem what so ever about power. Comfortably cruised at and around 80mph. Less wind buffering, etc. I'd love to do more 2-up with panniers rides. I heard GS is a better choice for that but I LOVE my 990. I havent done as much 2-up dirt as Dunerat (hi Val ) but it fells great on dirt as well.