Nope. Chakra gets regenerated so it's constantly coming back. The fourth only sealed half of his chakra at the time or his body one of the two. But that doesn't stop it from coming back to full power of what it was before. Like look at the pain arc when naruto when 8 tails. The kyuubi was huge, looked somewhat as big as before when the fourth fought him. So it could of came back to full over time. But naruto has a bigger chakra supply to begin with I would assume he does still have more then KB.