Something I don't understand about the Manual recomendations of tire pressure. An Evo Fatboy has a dry weight of 650lbs and a TC Ultra (03Manual) is 778 dry,128lb difference dry, they both according to HD should have 36psi front and rear for all FL's until you add a passenger(size not mentioned),then pump rear only to 40psi. Factor in the fluids and size of different riders and passengers( I'm 215 lbs and some of my large buds are 300+ lbs) Could this be part of the problem a lot of decker riders have with the tires cupping(underinflated characteristic)
I can't see how one size fits all in respect to tire pressure when there can be such a wide difference in load on the tires.
Some of these guys approach max load of the tires just getting on the bike and IMO should adjust pressure accordingly, especially when packed for a road trip.