You sir is so correct.Lol,you guys should take it easy. You're misunderstanding the OP
What he meant to say was if or when Narutos chakra is low and he utilises Kurama's chakra, it doesn't necessarily increase naruto's large chakra reserves and besides,after using Kurama's chakra he's own personal chakra will still be low. So Kurama doesn't replenish narutos low amount of chakra. Naruto only utilises Kurama's in a fight but he still has a low chakra
I swear most people in NB really doesn't read properly before posting bullsh*t!