Board Thread:Naruto Discussions/@comment-25343176-20141217153708/@comment-3531945-20150501192427

SPSM is made up of two things with exception to naruto's own sage chakra


 * the rikudo's chakra


 * the tailed beasts

Naruto has never lost hagoromo's chakra, its shows in him being able to fly, manipulate chakra with one hand in the movie and possibly manifest Kurama without sealing (not so sue tho, lol) plus if it were temporary Sasuke would lose his rinnegan cause all rinnegans are powered by "hagoromo's chakra" but sauske still has his own meaning hagoromo's power-up is permanent.

Naruto has lost or probably exhausted the chakra the beasts gave him in their subconscious plane since they're not fully sealed but subconciously linked with him, if he wants to get their chakra, he just needs to commune with them and receive more to combine with his rikudo chakra and sage chakra to obtained SPSM again.

I believe this answers why naruto didn't go SPSM but looking at the movie he didn't really need it plus i believe kishi thought it would be overkill since the SPSM form was able to combat the Originator of chakra much less a tenseigan user