Board Thread:Theories and Speculation/@comment-27260817-20160203170532/@comment-945885-20160204101814

All of the official material for The Last names his transformation "Kurama Chakra Mode." They aren't given names in Boruto, but since they clearly aren't Six Paths Sage Mode it must be Kurama Chakra Mode. It just changes appearance based on the clothing he's wearing.

Six Paths Sage Mode has the Six Paths seal on his back, which is the most obvious identifier for the form, and is mirrored in Obito and Madara's transformations after they use Six Paths Coffin Seal to become Ten Tail's Jinchuriki, which is "the same power." Madara even recognizes the symbol on Naruto's back to know that he's obtained Six Paths Sage Jutsu. The other obvious identifier is that only his clothes and hair transforms. In Kurama Chakra Mode he gains a fancy chakra cloak that covers his entire body, including his skin, with an orange aura.

The closest thing we've gotten to an explanation for why he doesn't use Six Paths Sage Mode again after the fight with Sasuke is that he needs to draw on the chakra of all nine biju. The databook and *Hiden* novels indicate that when Naruto became host for the chakra of all nine biju, he became an ersatz Ten Tails Jinchuriki, awakening the same power that Obito and Madara awakened when they used Six Paths Coffin Seal to become hosts of Ten Tails. After the fight with Sasuke he only had a fraction of that power remaining, because he only has the vestiges of the biju's chakra lingering within.