Board Thread:Theories and Speculation/@comment-32742265-20180119154238/@comment-6769189-20180212102005

Chidori requires a lot of chakra. Sasuke's stamina may have been a problem and that was the focus of his training. Even Kakashi had limited number of uses per day as an adult jonin. Sasuke being a 12ish year old genin wouldnt have the reserves to maintain it unless trained specifically for it.