Board Thread:Naruto Discussions/@comment-2048489-20140718132129/@comment-17623-20140718140037

So far, all Kurama has shown was massive strength (not uncommon), lots of chakra (not uncommon) and sensing of negative emotions.

That's why when used, Kurama had just provided Naruto with buttloads of chakra to do typical Naruto things, like the army of shadow clones or Tailed Beast Balls.

If Kurama has an elemental nature, it just either doesn't like using it or doesn't even know it has it.