People keep saying kakashi has low chakra but he doesn't. The reasons people often give is that if he uses a lot of techniques he get weak and the most common is he is weak after a few kamuis. But kakashi's chakra is highly above average, considering the fact that he can't turn off his sharingan. His chakra is constantly draining even when he is not fighting cos his sharingan is on 24/7. On the matter of MS, its a fact that all MS abilities drain chakra. For instance even itachi who is an uchiha was weak after he used MS on kakashi. He was also weak after he used it on sasuke, he couldn't evan dodge a shuriken. So kakashi being weak after kamui is normal. It just my own point of view. Your thots....