even if naruto can use pa and ma to go into sage mode, it takes time to do that - remember when jiraya faught nagato - it's not as simple as summoning them and snap, you're in sage mode. bee is very fast too and will force naruto to stop gathering natural energy. sasuke had trouble dodging his attacks. and even then if somehow naruto goes into sage mode, bee can go into level 1 and they'd be equal. and if bee charges with full level 1 speed at naruto, he won't be able to dodge it (sasuke had the sharingan). only raikage can dodge that and if naruto is in kuubi chakra mode, but not in sage mode.