How do you get someone to "take over payments?"?

I used to have a Honda CBR, I paid cash. Then I sold it and financed this Harley Nightster.

It’s nice, but I really want another CBR, it’s just not the same for me.

So here’s my question: I’ve seen people offering a “take over payment” deal on bikes. How does that work? I’m interested in just having someone switch the loan to their name and take over payments so I can get the bike I want.

Any details would be greatly appreciated.