Board Thread:Naruto 7: Discussion/@comment-24516546-20141107133049/@comment-3531945-20141203081222

i believe there's two reasons why kishi didn't let him use SPSM

-Anime watchers haven't seen it

-toneri wouldn't stand a chance against naruto with it since he lost to sage kurama mode

Naruto using a one handed rasenshuriken shows that he still has that mode, since he's only been shown to do so after he obtained that mode.