Intersting, I was always riding 2 up, so the Sportster was and felt cramped two up, having said that a friend on his 883 did nearly 4k miles on one 2 up across the States with the peanut tank and a spare petrol jerry can tied to his rear carrier back in 93.. 90th anniversary celebrations. Other than he had trouble with the top of the heads working loose, it ran faultlessy over the 3 weeks or so... I have to go sit on one with an eye to one up riding.
22 Plus Four KIMI 12 Plus 4 Sport OZZY 08 Roadster FELIX 06 4/4 70th LOKI 77 4/4 SEAMUS 85 4/4 MOLLY