Kibas strength was his speed, remember he was attacking Naruto in such a way that Naruto couldnt even do a kage bunshin

also heres something thats stupid
why do the sound nins just not team up against the genins in the first place, instead of just stopping and dropping off a member one at a time - if they all just teamed up on the genins (like a ninja squad is meant to do) this whole chase would have been over in a few seconds
its like how Kabuto was able to beat at least 5-10 ANBU squad members and Tsunade throughout the manga but he was unable to beat Naruto