i hate it when people say naruto is weak without the nine tails, its not true naruto is jonin level if not kage level in his base form, also take what kakashi said as proof...naruto has a chakra level 10-100 times higher than kakashi as he stated without the ninetails influence and also kakashi stated naruto has surpassed him in skill and sage mode just multiplies that x1000(imo) and really the only thing kurama's chakra give him is enhanced physical features and nukes to spam, and other than that when he learns ftg technique and the technique his father wanted him to complete its a done deal...he even beat kurama in sage mode. naruto without kurama is kage level.