naruto would be strong with out the nine tails but not as strong as having the nine tails in him, the four put the nine tails in naruto to make him more powerfulNow before you write anything stupid you have to read everything! If Naruto wouldn't have Kurama in his body, he would be stronger than he is now ,When he is not using kurama of course. Kakashi said that Naruto without Kurama would have about 200 times more in his chakra reserves. And that is pretty much and you can't decline it. He would be able to do so much more and I just want to tell the people that says that Naruto would be nothing without Kurama.. NO! He would be 200 times stronger! but that naruto compared to biju mode Naruto right now That is another question..