He's is extremely weak without those powers. He's not bright, has no special talent, a bit resourceful but that's it.
This is one of the major gripes I had with his fight against Neji.
Neji was always boasting about talent and potential and Naruto was going to prove him wrong but there's no denying that without his extreme Kyuubi powers he wouldn't have stood a chance.
What a way to discourage Rock Lee who was always trying to beat Neji. =\