Board Thread:Naruto Discussions/@comment-25343176-20141217153708/@comment-3965545-20150430032946

No, they lost the seals when they sealed Kaguya, they lost the chakra gifted to them when they USED it all fighting and then ending infinite tsukuyomi. Losing that chakra means losing the SPSM. Obito lost the chakra and had to steal a bit from Madara, and even then he could only make one truth seeking ball with it. Could Obito go into his SPSM again? No he couldn't and didn't. Why would Naruto be an exception? Naruto lost it. Same way that Kakashi's chakra gift was only temporary.

Ninjachris read this.

http://naruto.wikia.com/wiki/Six_Paths_Sage_Mode