It has been stated that Narutos tailed beast mode is not complete yet and that is obvious since he can only enter the mode for 5 minutes max right now. However it is unclear if his completed tailed beast mode will be like Killer B's, were he physically changes into the nine tails or if he will always have a chakra cloak because he only has half of the nine tails chakra. However to me it seems as though having a nine tails chakra cloak maybe better than actually becoming the nine tails.
1. Attacks can't actually hurt the chakra instead they will probably just tire Naruto out. Unlike B who has been basically taken out of the fight with Tobi because he got hit.
2. Because he is in a shield of chakra amaterasu shouldnt be able to hit naruto. And i think chakra maybe the one thing amaterasu can burn (i have no proof though)
However I also think it leaves Naruto with one weak spot which would be his actually body. If you can pierce the chakra you could easily hit naruto.
Thoughts...
1. Attacks can't actually hurt the chakra instead they will probably just tire Naruto out. Unlike B who has been basically taken out of the fight with Tobi because he got hit.
2. Because he is in a shield of chakra amaterasu shouldnt be able to hit naruto. And i think chakra maybe the one thing amaterasu can burn (i have no proof though)
However I also think it leaves Naruto with one weak spot which would be his actually body. If you can pierce the chakra you could easily hit naruto.
Thoughts...