Board Thread:Theories and Speculation/@comment-30241447-20170409050955/@comment-1512913-20170409101543

Nah, Kurama is no longer the most crucial part of his power, it's Six Paths Sage Mode. Also Tailed Beasts can be easily transferred or simply sealed anew, as shown before, so I doubt Momoshiki was referring to Kurama while saying Naruto can't pass on his power. Most likely Asura's chakra and Six Paths Senjutsu.