A/N. In case you hadn't picked up on it this story is set with Naruto leaving just before the war starts in the canon. He obviously didn't handle the encounter with Sasuke very well and left just after that so he hasn't gone through the training with Bee.
Again thank you for all the response, greatly appreciated.
Review if you are an awesome human being ;).

Kakashi assessed the situation in his normal calm manner but if you were to look closely at his eye you could see it was narrowed with concentration. He knew what had happened to Jiraiya when the Sanin was training Naruto, and Jiraiya was a lot stronger than him.
If I don't come at him with the intention of killing him then I will die. That is certain.
The Kyuubi influenced Naruto looked Kakashi in the eye and bared its teeth in a bone chilling grin.
This isn't Naruto, but if I hurt him I will hurt Naruto.
"
Naruto, Snap out of it!" Kakashi said calmly.
Naruto moved towards Kakashi, his frightening expression unchanged.
"NARUTOO! I SAID SNAP OUT OF IT" Kakashi screamed this time completely losing his cool. I have to get through to him otherwise I'll have to fight him he thought grimly.
Smiling even wider, the thing leapt at Kakashi. Pulling up his forehead protector revealing his sharingan in one swift motion Kakashi stood ready.
I guess Naruto's not there anymore.
Facing his enemy, kunai ready they both lunged at each other simultaneously dodging the others attack. On all fours the possessed Naruto crouched, before pouncing at Kakashi again who dodged yet another attack swiftly. That was Kakashis strong point after all, moving fast. Leaping an impressive distance backwards Kakashi repositioned himself and stood standing on a tree branch frowning looking down at the monster that had his ex pupil trapped inside somewhere. With a series of quick hand signs Kakashi breathed out a massive fiery ball which enveloped the entire forestry area with flames. Sighing heavily he waited for the flames to subside and watched as he saw a grinning Kyuubi appear crouched in the exact same spot he had been when Kakashi performed his jutsu.
He didn't even attempt to dodge.
Heavy concentrations of charkra began flying towards Kakashi forcing him to move. His opponent's persistent attacks followed him as Kakashi dodged but the copy ninja was fast. A huge wave of chakra flew at him at break neck speed trapping the man who had run out of places to dodge knocking him down. Kakashi fell from the tree dropping fast, he was just about to hit the ground when a log hit the floor instead. Appearing behind Kyuubi Kakashi attempted to form an earth style barrier to trap his opponent. Mud ropes rose from beneath the dirt and wrapped themselves around the foxes fiery red legs and body.
Roaring in outrage Kyuubi freed himself from the trap and swiped at Kakashi sending him flying. His head hit the same tree he was standing in earlier stopping his movement immediately.
Warm blood trickling down his neck, he opened his eyes to a fuzzy fox crouching before him.
"Oh Naruto, you never have been one to listen" Kakashi choked out before the world went black.

A/N
Sorry for the short chapter but I did have to end it there for today. The next chapter will hopefully be longer to make up for it.