what the buddha said about his own karma? I have a strong believe in buddha but i am not much in karma logic. Had the buddha said anything of karma? If yes then what and if not then how? I am seeing some people getting back in a very amazing way whatever they had done in their respective past. Sometimes it is related to extreme past events, even. Like having a generation gap, too.
what the buddha said about his own karma?


The Buddha mentioned that there were 8 past Karma which were effective even after becoming Buddha. See: Why the Buddha Suffered - Apadāna 39.10


  but i am not much in karma logic.


Karma is one of the things that only a Buddha completely understands. We can only have a rough idea of its operation.


  I am seeing some people getting back in a very amazing way whatever they had done in their respective past.


Even outside Buddhism there is a saying your past catches up with you. In the Buddhist perspective this is termed Karma.


  Sometimes it is related to extreme past events, even.


There are 5 Niyamas or causal factors which define your experiences and also being in the wrong place the wrong time and the right place in the right time, i.e., random events. So past Karma or action does not dictate all results. 


  Like having a generation gap


I do not think the generation gap has anything to do with Karma. This is more to do with social, technological and attitude changes.