I am with Mike on this. I wouldn't be trying to load an Ultra Classic in the back of a pickup with a regular ramp unless I had a couple of gorillas to help push it in.
A few weeks ago, a friend of my son rides over on his dad's Ultra Classic. When he's ready to leave, the bike won't start. He calls his dad who comes over in his 4WD Chevy pick-up. He slides out an 8 ft. 2X10 to use as a ramp load the bike. I'm thinking this is gonna be trouble. His son questions the strength of the lumber but dad says "Aw, it's okay, it's pressure treated". Four of us pushed it right up the board into the back of the truck. We loaded it in the street in front of my house. The tailgate of a 4WD truck is up there pretty high and 8 feet is not a very long ramp for that angle. I made sure I was pushing at the rear of the bike so I could get out of the way. I was amazed at two things. One, that anyone would try to load that bike with a board for a ramp, and two, that it actually worked.
I have a ramp, nice and wide folding aluminum, that I used to load my RK on a few occassions. Rated for 1000 lbs.NEVER had a bit of trouble, just make sure it doesn't kick out from under you when loading. I cured it by attaching a cable to the hitch and hooked it onto the ramp. I'm willing to sell it, not used much 'cause my bride rides now so we have a trailer for the extra long hauls