Board Thread:Theories and Speculation/@comment-26037879-20151013211511/@comment-681696-20151013232941

My theory is that when Naruto and Minato alter Kurama's chakra to match their chakra, and the altered chakra is used for Tailed Beast Mode it manifests in a chakra based version instead of the Kurama's original flesh and blood version.

Regardless of why Naruto and Minato have the chakra based version, why would Naruto waste chakra and concentration using the transformation technique.