***Possible Spoilers!!***
I hope you all dont mind me starting a new topic in here. I did a search thru the archives to see if I could find the answer, but I came up short.

What is it that makes the Librarian build Death's motorcycle?

At first I thought it was the music that was keeping Buddy alive, but that doesnt make any sense. Death is the one that "kills"* the music in the end, so you wouldnt think it wouldn't help along its own demise by providing the librarian with plans for another "horse" (more like hog) for death.
Thoughts? Ideas?

*I understand that Death didnt actually "kill" the music. It couldnt BE killed, right?