Board Thread:Naruto Discussions/@comment-9782468-20170118003542/@comment-734582-20170125103218

Namikazenaruto9 wrote: Even if they took extra nature energy they balanced it with what? Willpower. Keep in mind that chakra is needed so you don't get instantly overwhelmed. Even though he had massive amounts of chakra, Naruto still needed to focus to balance it. His clones were focusing on nothing but maintaining Sage Chakra, meaning that their threshold for Nature energy could be much higher. Once broken, Naruto's Nature energy is refilled. The remaining clones can then absorb even more Nature energy (since fewer clones now exist and thus the remainders have both more chakra and willpower). Thus, Sage Mode is maintained for Naruto.